Can I optimise an existing app with DTT?

Yes, at DTT it is possible to optimise an existing app. The DTT team has extensive experience in analysing and improving existing applications to enhance performance, usability, and functionality. Whether it’s improving speed, refreshing the design, fixing technical issues, or adding new features, DTT offers tailored solutions that align with the needs of your app and users. Through thorough analysis and a structured approach, DTT ensures that your app not only meets current standards but is also future-proof.

Have an app created? iOS - Android - Web | DTT

Create an app

Q: How much does it cost to have an app developed?

The cost of developing an app depends on various factors, including: the desired functionalities, the intended platforms (e.g. iOS, Android, web), the technologies used, and opportunities to reuse existing projects from DTT. For a specific price, it is best to request a quote based on your specific needs and requirements.

Q: How long does it take to develop an app?

Generally, developing an app takes between 2 to 6 months. Of course, this can vary significantly depending on the desired functionalities and the scope of the app.

Contact

App maker

Are you looking to develop an application and searching for a reliable app builder? At DTT, we know exactly what it takes to create an effective app. From our office in Amsterdam, we have the expertise to develop high-quality apps for iOS, Android, and Web. Over the years, we have built a strong portfolio for international companies, independent entrepreneurs, startups, and SMEs.

Do you want to develop an application for your organization and partner with DTT as your app developer? Feel free to contact us.

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We have received your request for an appointment and will call you back in max 2 business days.

In a hurry? Give us a call +3120 331 5848

Why create an app with DTT?

DTT stands for 'Doing Things Together', with a strong focus on collaboration and building good relationships. Alongside delivery, communication and contact are key. We are involved and communicate openly and honestly. We don’t aim for the 'quick wins'; instead, we focus on long-term relationships and high-quality deliverables.

In our collaborations, co-creation is key. Together, we reach a compelling outcome. Below are some of our clients:

Greenpeace: To raise awareness about protecting the Southern Ocean, the habitat of penguins, we created the King Pinguïn AR-app.
Randstad: A Progressive Web App, allowing 36,000 employees worldwide to share their stories and ideas about the Human Forward Approach in various forms, such as: videos, images, and text notes.
HG: With the HG Sales App III, representatives can efficiently plan routes, prioritise appointments, and work offline, enhancing the sales experience.

Extensive experience across various industries

By working closely with our clients, we have built expertise across different industries. We have experience in developing:

When developing an app, everything revolves around the user experience. We start with a functional design. This shows all screens, functionalities, and illustrates how the user navigates. At DTT, we strive for top quality and a design that stands out. Discover in which industries we have applied this as well.

Our projects

Different types of apps

Apps come in various forms and sizes. Each app is designed to meet specific needs, using different techniques. Native apps are specifically developed for one operating system, such as iOS or Android. This ensures optimal performance and full access to all device features.

Web apps, on the other hand, are platform-independent and run in the browser, making them easily accessible without installation. Hybrid apps combine the advantages of both: you build one solution that can be deployed on multiple platforms, such as iOS and Android, web, and desktop.

Additionally, there are also Progressive Web Apps (PWAs), which use web technologies to provide an app-like experience, with offline access and push notifications.

The choice of app type and the techniques used depends on the objectives, target audience, and required functionality of the app. Explore the possibilities!

Our techniques

iOS apps

With native iOS apps you make a smart choice for long-term success. Because the apps are specifically developed for Apple devices, they perform optimally and have access to all features of the iPhone, iPad, and Apple Watch. This is crucial for apps that make intensive use of hardware, such as the camera or sensors. Additionally, Apple’s closed ecosystem offers extra security and reliability, which is important for users.

Android apps

With native Android apps you are assured of a future-proof solution. Since the app is specifically developed for the Android operating system, you benefit from maximum performance. The app has full access to all the smartphone's features, which is essential for apps that use complex extensions. Furthermore, Android offers massive growth opportunities as it has the largest user base globally.

Creating an application in 4 steps

Our approach brings your idea to a compelling app. Step by step, we work together towards an effective solution that really helps you. Solidly designed and future-proof. This way, you stay at the forefront and are assured that your solution will still be running smoothly in a few years.

Concept and strategy: our collaboration begins with a kick-off session where we zoom in on the desired solution and objectives.
Research and design: In co-creation, we combine our knowledge and experience, working together on a solution that aligns with the established goals.
Estimation and planning: we make the investment concrete with a budget based on an open calculation. This helps us create a successful and strong first version within the desired budget.
Start development: Once the budget is approved, development begins. We work together towards the first milestone: a successful launch.

Creating an app with DTT

Want to know more about creating an app? We would be happy to invite you to our office just around the corner from Dam Square to discuss your needs. Feel free to contact us.

Frequently Asked Questions about creating an app

How much does it cost to have an app developed?

The cost of having an app developed depends on various factors, including:

The desired functionalities
The intended platforms (e.g., iOS, Android, web)
The technologies used
Opportunities for reusing existing projects from DTT

For an accurate price, it’s best to request a quote based on your specific needs and requirements.

Can I optimise an existing app at DTT?

Yes, it is possible to optimise an existing app at DTT. The DTT team has extensive experience in analysing and improving existing applications to enhance performance, usability, and functionality. Whether it’s improving speed, updating design, solving technical issues, or adding new features, DTT offers tailored solutions that meet your app’s and users’ needs. Through a thorough analysis and structured approach, DTT ensures that your app not only meets current standards but is also future-proof.

How long does it take to develop an app?

Typically, developing an app takes between 2 to 6 months. Of course, this can vary significantly depending on the desired functionalities and the size of the app.

How long does it take for my app to go live in the App Stores?

The time it takes for your app to go live in the App Store can vary, depending on various factors. Generally, at DTT, it takes about 2 to 6 months to build an app, depending on the complexity and specifications of the project. After the development phase is complete, a testing and approval process follows, both internally and with Apple (for iOS) and Google (for Android). Submitting to the App Store itself can take anywhere from a few days to weeks, depending on how quickly Apple or Google approves the app. This process can be influenced by the quality of the app, adherence to the App Store guidelines, and any revisions needed after feedback from Apple or Google. In summary, the total timeline can range from a few months for development and a couple of weeks for approval, after which your app will be available to users in the App Store.

How much does it cost to maintain an app?

Annual maintenance costs are typically around 10-20% of the development budget. Various factors influence maintenance costs, such as the scope of the solution, platforms (iOS, Android, Web), any integrations with other systems, and the level of (proactive) support required.

Want to learn more about the costs involved in app development? Read our article: How much does an app cost?

Testimonials from our clients

Hebban

Sander Verheijen, Editor-in-chief

"Our beautiful Hebban Books App was built by DTT in Amsterdam. A partnership we are still super happy with."

Check out our project for Hebban: the Hebban app

Royal Navy

Nathalie Zwagerman, Communications consultant Social Media

"DTT contributed to a hassle-free experience for our visitors during the Marine Days by developing the Marinedagen app.

A fantastic result was achieved in a relatively short period of time. Among other things, the app enabled visitors to keep up to date with the latest news, follow the programme and discover the grounds via a clear map. The application ensured that our visitors were properly informed before, during and after the Navy Days.

We have come to know DTT as a reliable partner who thinks along in solutions despite the necessary challenges. They are available for questions 24/7. All in all, a very pleasant collaboration. Thank you for that!"

Check out our project for the Royal Navy: the Royal Navy Days

Flamma inspection app

Mustafa Demirayak, Project lead

''We commissioned DTT to develop a logbook/inspection app for our company. After working with DTT for 2 years, the end result was very positive. DTT is still working on new developments for our company app. The new app helps our employees work faster, more efficiently and effectively. Great to see that everything within our company is completely automated, thanks to DTT's thinking team. Doing Things Together.''

Check out our project for Flamma: Flamma Inspection App

Universiteit Twente

Ernst Bohlmeijer, professor of mental health promotion

''DTT built for us two progressive web apps for our positive psychology trainings of self-compassion and gratitude. The beautiful designs allowed us to test the effectiveness of our trainings in scientific research.

I have experienced DTT as a pleasant organization to work with in the development of our apps. They think along very well and always keep perfect appointments. In addition, they respond adequately at times of need. I was pleased with the result.''

Check our project for the Universiteit Twente: Zo Erg Nog Niet & Compas-Y

Kamer van Koophandel

Marco van Hagen, business support consultant and Gabriëlle Hoogendoorn, productmanager

"Very recognizable, the description from other organizations about the cooperation with the DTT team.

DTT pleasantly supported our team in developing game concept into a fun and educational app that allows entrepreneurs to learn more about importing through play. By playing import missions, users receive immediate feedback on their own knowledge level. Through the achieved score and ranking, they challenge friends to compete.

DTT worked out a complete game in a short lead time. Short lines of communication. Clear in expectations management. Great patience with our search for the maximum achievable within the proposition. Good at translating wishes and requirements into a practical solution."

Check our project for the Kamer van Koophandel: KvK Import Game

Ministry of Health, Welfare and Sport

Marlies P. Schijven, CMIO Ministry of Health, Welfare and Sport

''DTT has built the 'ziekenhuisbedchecker' for the ministry of Health, Welfare and Sport, with which we can give every healthcare provider free insight into the available beds, IC and non-IC, COVID-19 and non-COVID-19 in the Netherlands from existing registration systems. The ziekenhuisbedchecker has recently been expanded, so that the availability at the emergency department is now also visible.

This is going to help us enormously even after the corona crisis. After all, ambulance services know whether they should drive to a hospital or not, and GPs can see if there is a bed available at the emergency room before they have to make rounds if they want to send in a patient. DTT has really done this in record time, I am very impressed by the commitment and thinking along in turbulent times. Very professional, well-coordinated party. Definitely the right choice!''

Check our project for the Ministry of Health, Welfare and Sport: ziekenhuisbedchecker

Randstad

Joost Schriever, Global Director Marketing

‘’DTT has built an application for us, with which we can digitally replicate and decorate every Randstad location in the world. This will help us tremendously during the worldwide spread of our new positioning Human Forward. Furniture, wall decorations, floors and other elements can be placed into the location with the tool. Simultaneously, a calculation is being made of the coinciding investment.

We have gotten to know DTT as very professional, creative, correct and extraordinarily fun.’’

Check our project for Randstad: Randstad Office Configurator.

Greenpeace Nederland

Ehtimaad Rais, Online Campagner

"Speaking for both myself, Joost and the entire projecteam, I would like to thank DTT deeply for your efforts. We are thrilled with the end result!

When we approached you with the request to make penguins appear everywhere in the Netherlands through AR, we received an exceptional proposal. A very entertaining elaboration of our campaign to make the South Pole a protected marine reserve. Together we quickly came up with the name for the King Penguin app and fun occasions to use the app so everyone can search virtual penguins via AR in their own neighborhood. By combining this quest with information about the animals and their threatened environment at the South Pole, awareness is created in a playful way. And that's exactly what we wanted. Once again, compliments on how fast you brought this amazing app into the digital world. I experienced it as a very pleasant collaboration."

Check our project for Greenpeace Nederland: King Penguin - Greenpeace AR.

Laborie

Albert Meek, director R&D

''Laborie specializes in the development of medical equipment. Some of our older medical equipment (urodynamic system) uses an Android board for a user interface (touchscreen display). DTT helped us perform an essential update of an embedded Android app on our urodynamic devices. The changes were related to the communication between the system modules and the Laborie PC software that connects via Bluetooth. Recent problems with component availability caused a shortage of Bluetooth chips, so we had to modify the Android interface to work with a USB connection.

Using their knowledge and expertise, DTT adapted our Android app to communicate with our peripherals via USB or Bluetooth in a timely manner. The development and communication with DTT went very well and we are grateful for their support in making the necessary adjustments to our Android application. DTT has proven to be a reliable partner that helped solve our problems. We enjoyed the collaboration and will work with DTT for future Android projects.''

I-Sec Netherlands

Camiel Kuiper, projectmanager

''With the progressive web app developed by DTT, we have a reliable medium through which our colleagues have 24/7 access to various HR matters such as the schedule, but also (news) messages.

With DTT's expertise, we developed and implemented the PWA entirely on schedule. The development process and communication went smoothly, with DTT thinking along with us. Now more than a year later it is still running smoothly.''

Check out our project for I-SEC Netherlands: MY-SEC

Municipality Hollands Kroon

Han van Egmond, core administrator

''Litter is a major annoyance for a lot of people.'' At the elementary school of the municipality of Hollands Kroon, children from group 6 had the solution. A game-app should contribute to the reduction of litter.

We came to DTT with a reasonably well-developed idea. The idea was received with great enthusiasm. The game is intended to make young people aware of the litter problem.

DTT pleasantly surprised us with the development of this app, Operatie Z.U.I.V.E.R. The game, like Pokémon GO, can be played with Augmented Reality in the public space. The game is instructive, you can play alone, but also with groups against each other. In the app you can add schools and sports clubs to compete with each other. We think it can make a major contribution to the awareness of litter among the youth. DTT has helped us enormously with the development of the app. They think along creatively, come up with solutions and are ready to answer our questions. Together we have expressed our intention to develop the app further.''

Check our project for the municipality Hollands Kroon: Operatie Z.U.I.V.E.R.

Dutch Media Literacy Network

Aniek Breevoort, Productmanager

''Since the beginning of 2021, Dutch Media Literacy Network has entered a collaboration with DTT for the serious game MediaMasters. In a very short time (6 months), DTT has developed a completely new version of MediaMasters including a teacher portal, Content Management System (CMS), website and the game environment itself. They have done this very skilfully with an eye for detail and planning. DTT is an agency that can think along with you about what is necessary, acts adequately and is very reliable. They also offer good service on the solution and have a high response speed if assistance is needed. We are therefore very satisfied with this collaboration.''

Check our project for Dutch Media Literacy Network: MediaMasters

Real-Time Road Inspection

Andries Takke, director Takke Breukelen B.V.

''A safer Dutch road network, that's what I longed for about eight years ago when the first idea for Real-Time Road Inspection (RTRI) popped into my head. For my work at Takke-Breukelen B.V. we are on the road a lot. While driving, you see many deviations in the infrastructure, such as holes in the road or traffic signs that are placed incorrectly. Surely there should be a simple way for this information to reach companies who can do something with it?

Once the idea was born, DTT was able to convert it into the RTRI app, which delivers real-time images of the current state of roads and public spaces and sends them to an online platform that companies can join. A useful app for any company that has anything to do with public space. This is because it allows for the quick resolution of infrastructure anomalies. Users also have the option of flagging images when deviations are noticed on the road, for example when there is damage to the road surface.

We at RTRI are extremely satisfied with the app developed by DTT. Everything has been thought of. Faces and license plates that are loaded into the app, for instance, are blurred by means of Artificial Intelligence. In this way the privacy of everyone is guaranteed, while the app can do its work. DTT has also ensured that new data automatically replaces outdated data. Moreover, a very complex caching mechanism was used, because a lot of data will be loaded into the app (over time). A fine piece of work, in which we have experienced a very pleasant cooperation.''

Check our project for Real-Time Road Inspection: Real-Time Road Inspection

JellinekMinnesota

Harjo Keizer, advisor care innovation and ICT

“We have come to know DTT as a great club to work with, a proactive attitude and thinking along with the client are of paramount importance. At the start of the collaboration, we deepened strategy and concept with DTT, followed by the delivery of a creative strong design with strong gamification elements. Furthermore, their organizational strength and process-oriented approach ensured that we moved smoothly and steadily towards a nice final delivery.”

Check our project for JellinekMinnesota: JellinekMinnesota recovery app

University of Twente

Ernst Bohlmeijer, Professor of mental health promotion

''DTT has built two Progressive Web Apps for us for our positive psychological training of self-compassion and gratitude. With the beautiful designs we have been able to test the effectiveness of our training courses in scientific research.

I have experienced DTT as a pleasant organization to work with in the development of our apps. They are good at thinking along and always adhere perfectly to the agreements. In addition, they respond adequately when necessary. I was happy with the result.”

Check our project for the University of Twente: Zo Erg Nog Niet and Compas-Y

The Netherlands Nutritions Centre

Irma Evenhuis, Project Coordinator

"The Canteen Scan, an online tool that helps providers to make their eating and drinking facilities healthier, was ready for an update. We have put a 'dream scan' on paper with all our wishes and those of our users. Together with DTT, we translated it into a design, which was then built.

With multiple user roles, different needs per environment where food and drinks are available (school, sports, work) and the link with an existing food database, the Canteen Scan is not a simple tool. But DTT has succeeded in translating our wishes into a nice tool. The new Canteen Scan is a visually modern, adopted and user-friendly web app.

Those involved in canteens and restaurants can enter the products offered and their placement on the basis of photos. Users additionally receive advice for improvement, so that locations are able to take steps towards a healthier eating environment that stimulates consumers to make healthier choices."

Check our project for the Netherlands Nutrition Centre: Canteen Scan

Dutch Noorderkwartier Water Board

Marieke Duijn, Communication advisor

"We wanted to develop an online game that would make people more familiar with the work of the water board and what residents can do themselves for clean surface water. With facts about water so that it is not only fun, but you can also learn something while you’re playing the game. DTT has helped us a lot in the search for what eventually became the HHNK Clean Water game. A fun competitive and informative game. The creative and approachable employees of DTT and their quick actions during the development process have positively surprised us!"

Check our project for the Dutch Noorderkwartier Water Board: HHNK Clean Water game

Multibel

Maurits Knopjes, co-director Multibel

“The DTT design team has helped us a lot to update the website, to get more conversions and to improve it technically. The same with our MultiBel app. The challenge was the combination of a modern design with improved user-friendliness. We are very satisfied with the result and this certainly makes you want more. Dealing with the team was pleasant, from the big boss to the individual designers, all professionals. SEE YOU SOON.''

Hulpapp

Stephanie Leyenaar, Director Foundation de Juiste Schakel

“We let DTT develop our website and app and I am incredibly pleased. Close communication, genuine interest in our foundation and we are only receiving positive feedback from our users. We would absolutely recommend DTT to anyone who wants to develop something. The employees get an A+ from us.”

Check out our project for Hulpapp: Hulpapp.

SportWallet

Pieter Rüpp, Co-founder SportWallet and Maurits Rüpp, Co-founder SportWallet

“With an idea in our heads we ended up at DTT. The initial communication went smooth and before we knew it, we had a meeting at their office. After a few brainstorming sessions we immediately went into the design and development phase and the results speak for themselves! It's extraordinary how DTT’s team managed to convert the idea in our heads into an actual app. Thanks to the experience and expertise of DTT are we able to control and manage the CMS of the app very easily and in an efficient way. Our decision to collaborate DTT has been the correct one and I would recommend them to everyone.”

Check out our project for SportWallet: SportWallet.

Chamber of Commerce

Marco van Hagen, advisor entrepreneur support and Gabriëlle Hoogendoorn, productmanager

"Very recognizable, the description from other organisations about the collaboration with the DTT team.

DTT supported our team during the development of the game concept to a fun and informative app, with which entrepreneurs can learn more about importing in a fun manner. By playing the import missions users will receive direct feedback of their own knowledge level. Via the attained score and ranking, they will challenge their friends to a competition.

DTT created a whole game in a short time. Short communication lines. Clear in expectation management. A lot of patience with our search for the maximum attainability within the proposition. Proficient in the translation of wishes and demands to a practicle solution."

Check our project for the Chamber of Commerce: KvK Import Game

KPMG

Patrick Özer, Senior Manager Forensic Technology

"DTT has helped us twice. First, DTT devised a prototype for an app and when this was well received, they made a fully dynamic version of the app. Our needs and requirements were not easy to fulfill, but during the pleasant co-operation we have come to a good design that satisfied both parties. In the implementation phase DTT came up with good proposals for the app, but also gave us good advice on how we could position our app within the organization. It is amazing how our complex scoring model was so easily implemented, so our non-technical colleagues can manage this through the back end."

Check our project for KPMG: KPMG Fine app I and KPMG Fine app II

Erasmus MC

Mary Dankbaar, Program manager E-Learning

"We wanted to create an additional training environment for medical students. On the basis of realistic medical cases, they can learn how to interpret heart and lung sounds. In collaboration with DTT we have developed Clinical Challenge app, so students can easily practice their knowledge.

DTT was a reliable partner; employees think along with you, quickly answer questions and provide quality results. Through a good rating system with highscores and attractive animations with sounds, it resulted in a good app. Students are excited about e-learning and are more eager to learn."

Check our project for Erasmus MC: Clinical Challenge

ING Bank

Stephan Swerissen, Formula Manager Savings and Investing

"We would like to emphasize:

Young, enthusiastic, technical and professional employees
Quick feedback and good communication via phone / email
Good at executing a concrete idea"

Read more about our project for ING Bank: ING Marketing Day app

Bouwend Nederland

Ad van Luijt, chairman of the Build@School Foundation

"Since 2015 we are playing a construction game at schools to encourage students to choose for construction technology. This game in which a Lego house has to be built, was supervised by a few game leaders. As it was becoming a problem to find enough game leaders every time, the decision was made to change the game into a digital construction game.

This is how I came in contact with DTT in Amsterdam. After meeting with Jeffrey and his organization, we decided to let DTT build the game.

This has been done to great satisfaction of our Foundation "Build@School". The employees of DTT were always there to process questions and suggestions that we had. The game is being played for a year now and we intend to expand the game further. Of course we would like to do this again with the cooperation of DTT."

Check our project for Bouwend Nederland: Bouwend Nederland e-learning tool.

De Lotto

Fiona Mirrer, Coordinator Marketing Communication

"For our most popular and best-known lottery scratch-card, December Calendar, we came up with the idea to develop a fun game that you can be played both on PC and on your phone. For this, we started looking for a multimedia partner and found DTT. Despite the short timetable, DTT delivered a super game: the December Calendar game. This game, starring the penguins from the December Calendar 2014 lottery scratchcards, is based on an existing game and is intended as a free fun bonus. You can't win (money) prizes, but you can get the highest score! Communication was smooth, clear and fast and we could always turn to DTT if we had questions. DTT also thought actively us on how we could generate more downloads and gave us good advice where necessary. In short, DTT has been an excellent partner. We will certainly continue working with DTT in future."

Read more about our project for De Lotto: Krasloten December calendar game

RIVM

Desirée Beaujean, Head of Development and Implementation Department

"The RIVM (National Institute for Public Health and Environment) had the "Tick bite" app launched in April 2014. This app was initially developed for Android. With this app people can check what ticks are and how to correctly remove them (even without internet connection!). Starting from July 2014 the app will be available for iOS also.

In the beginning we have spoken with a number of potential executors and we chose for DTT. What struck us was that from the very start DTT was very involved in the issue and the development of the app. The rates were reasonable and certainly played a role in choosing DTT. During our collaboration, we got to know Jeffrey and Dirk better. We emailed and called each other so often, we even noticed the urge to contact them when it wasn't even necessary. I think that says enough!

In short, DTT has been a great partner to develop an app. They are reliable and always up for a joke. Great job!"

Read more about our project for RIVM: RIVM Tick bite awareness app

BAM Utiliteitsbouw

Rinaldo Beunk, Computerisation Departement Royal

Safety on and around the construction site is an important issue for BAM Utiliteitsbouw and Royal BAM Group. To emphasize this, BAM Utiliteitsbouw has introduced the "BAM builds safe" web app. In co-operation with DTT the web-app was worked on with enthusiasm and realised in a short amount of time. The design and the development of the web-app was a urgent order. DTT has delivered a complete and fully operating solution. Our compliments to DTT and their proactive and flexible approach.

Read more about our projects for BAM Utiliteitsbouw: BAM Inspiration solution | BAM form

Ministry of Health, Welfare and Sport

Rian van der Broek, Deputy Chief Information Officer

We are very satisfied with the iStrategy app that DTT has developed for the Ministry of HWS. During our collaboration with DTT, we were pleased by their active thinking along, professional advice and their quick clear communication. Points as working with multiple parties, time pressure, and last minute changes changes weren't a problem for DTT.

Read more about our project for Ministry of Health, Welfare and Sport: iStratey policy app

KNHS

Karin Kramer, Online Communications adviser

"DTT has really done a great job by developing the first KNHS Dressage and riding tests app for iOS and Android. Despite the short development time (and thus high pressure on the project) DTT has taken the usability of the app into account and has given clear advice on functionality and design. Thanks to the pleasant and efficient co-operation, the app could be launched on schedule and within budget. This was well noticed: the app reached the number 1 position in the category 'best paid' in iTunes. The team of DTT is commited, enthusiastic, works fast and communicates clearly. An absolute must!"

Check our project for KNHS: Dressage test app

Johan G. Gelderblom, Director Finance, Administrative Organisation and Information Technology

"We were looking for a specialist, that could guarantee speed, transparency and quality of service and product and think along with the client! DTT has managed well to deliver the first project, a sales app for our international branches.

We decided to give our second project, a web portal for our international customers, to DTT as well. I am curious whether DTT will manage to succeed here. After all, as they say "You're only as good as your last game", so you have to prove yourself over and over again!

Project 3 (a second Sales app) and project 4 (a complete new website) are still on the drawing board, so .......!? "

Read more about our projects for HG: HG Sales app II | HG Order Portal | HG Webshop | HG Order app

Municipality of Medemblik

Minke Jellema, Purchasing advisor

‘’DTT has helped us tremendously with shaping our (many) wishes and ideas to a supportive web-app for all our tender processes. Shaping legal requirements to a ‘simple’ and user-friendly tool for our buyers has definitely been a challenge. DTT has fulfilled this challenge extremely well. We are very pleased with the end result! DTT is definitely a recommendation to work with. They are open and transparent and very good in carrying out a concrete idea.’’

Check our project for the municipality of Medemblik: Municipality of Medemblik PWA.

Warmteservice

Ramon Kostwinder, E-commerce Manager

"Together with DTT we have developed a native iOS and Android app for our b2b customers. With this app they can respond to assignments that individuals have placed on our Kluscontact.nl platform. We developed an API ourselves that communicates with the app.

At DTT they always fulfil their promises. Beforehand they clearly informed and advised us about various options related to native or non-native app. They also took into consideration all interactions and potential complexities that come with these options. The app is now live and our customers are very satisfied with it."

Check our project for Warmteservice: Kluscontact job platform app

NSI

Dennis van der Stoop, Head of Construction Management

DTT has developed several apps for NSI that saves time and paper for administrative work. The needed documentation is reported and communicated directly to the customer. The rapid approach and continuous thinking along in the process made it easy to work with DTT.

Read more about our projects for NSI: NSI landlords app | NSI Parxx

Valtifest

Laura Vogelsang, Co-owner

DTT has developed the first Valtifest app for us. Public surveys show that visitors of the festival had given a very high rating to this app. The project management during the app development was on a professional level. A pleasant co-operation with a wonderful product.

Read more about our project for Valtifest: Valtifest festival app

Aslan Music center

Anne Boer, Education Specialist

"DTT has developed apps for Aslan Music Center that teaches students to make music. DTT works very quickly, is easily accessible and thinks along with you. The aftercare is completed as expected. DTT has delivered a clear, user-friendly and reliable app.’’

Check our project for Aslan Music center: Aslan music school app

Eigen Haard

Bouke Molenkamp, Manager Zakelijke Markten

The experience we had with DTT as an app developer is very positive. They have a great ability to quickly and efficiently turn a joint idea into an actual working app. It is a proper challenge to develop a good concept with two independent housing cooperations in Amsterdam, Eigen Haard and The Alliance. With the commitment, expertise and pragmatic hands-on approach, DTT's work is beyond expectation. Through good, direct and precise communication we have created a great product in a very short time. Recommended.

Read more about our project for Eigen Haard: Blokster app

Tentoo

Patrick Blom, Manager Marketing and Communication

We have asked DTT to re-design the My Tentoo hour declaration system for our customers. DTT has made a high-end desktop, tablet and mobile design, while taking into account our customer requirements. The cooperation was good and constructive.

Read more about our project for Tentoo: Tentoo Adaptive Webdesign

Flamma

Mustafa Demirayak, Project Manager

“We have given DTT the assignment to develop a logbook/inspection app for our business. After working with DTT for 2 years, the end result was extremely positive. DTT is currently still working on new developments for our business app. The new app helps our employees to work faster, more efficient and more effective. Great to see that everything within our business has been fully automated, with thanks to the thoughtful team of DTT. Doing Things Together.”

Check out our project for Flamma: Flamma Inspection app.

Cleverstone

Farid Azarkan, Owner

"We worked very well with DTT. From the very first contacts they made a professional and skilled impression.

In all phases they are punctual, accurate and even better, they think along with possible alternatives and solutions. We completed the project on time and within budget. DTT also provides the agreed quality. What is special about Dylan and Jeffrey: they honor their agreements.

I would recommend everyone to do business with DTT."

Read more about our project for Cleverstone: GRIP real estate manager

VU Medical Center

Erwin van Wegen, Senior researcher Neurorehabilitation

Since 2012 we have been doing business with DTT to develop our Parkinson Exercises Android app in different languages. We work from a non-profit foundation with charitable objectives and in the beginning we had a lot of budget-friendly solutions. After DTT has converted our first iOS app into Android app, they became our go-to developer for Android versions of our app in multiple languages. The latest French version has a more complex development challenge with an in-app purchase and code access system. DTT has quickly and efficiently implemented it. Employees are flexible, work good and fast and respond promptly to emails and phone calls. Overall, a good company with excellent employees.

Read more about our project for VU Medical Center: EFOX Parkinson’s Home Exercises

Middin

Nicolette Jansen, Middin

Together with DTT we have made an app in which we provide sex education to people with a mild disabilities. Developing an app was a new experience for us and for DTT it was a completely new target group. DTT employees were able to translate our wishes and convert them into a beautiful design and concept, which matched well with the target group. The DTT team listened very attentively and the communication was very pleasant. We are very proud of our result and the product meets our expectations.

Read more about our project for Middin: Middin sex education app

Framez Media

Gerald van Engelen, Owner

So far, DTT has built 4 Android applications for us on behalf of our customers. The success of this cooperation has recently been extended, DTT can also develop our iOS applications now. Commitment, professionalism and quality are at a high level. Framez Media is a very satisfied customer of DTT.

Read more about our projects for Framez Media: Framez | Staatsloterij Wielercam app | Fox Sports Camera app | Hi-tec Walking Cam app

Kuraray Noritake Dental Europe

Maurice Bonn, European Marketing Manager

"Our task had an absurd deadline, scope-creep all over the place and a fixed price. DTT made it happen. With these stressful conditions, DTT has developed a product we are extremely pleased with. The commitment to meet deadlines is commendable, work didn't stop even during evenings and nights and quality is simply beyond comparison. For me, DTT has proven to be a very knowledgeable and knowing company. All this gives me the confidence to pick up the phone and call them directly for the next assignment."

Check our project for Kuraray Noritake Dental Europe: Kuraray noritake rating app

Nijmegen Medical Faculty Association

Roos de Jong, Board Member

As a study association, communicating to your members is of great importance, which is why an application is of great added value to us. DTT had carefully discussed the possibilities and use of the application with us. Jeffrey was very helpful, and I always received answers to my questions and demands. We, as medical faculty association of Nijmegen, are very proud of our application!

Daalder

Romke de Vries, Technical director and co-founder

From the first contact we were very well supported by the DTT team. DTT suggests additional ideas and options for our native Android and iOS Daalder Payment app and responsive website. For our services a continuous process of improvement and adequate bug resolving is very important, DTT is always ready to diagnose problems and resolve them.

Check our project for Daalder: Daalder payment app

Festive

Michael Webbers, Founder

Last year we launched Festive - a platform for the event industry. After contacting a number of app developers in Amsterdam, we knew that DTT was the right company to develop the iOS and Android applications for the platform. We successfully launched a great application at the scheduled time in April 2015.

Read more about our project for Festive: Festive Companion app

Welzorg

Sabine Doets, ICT Manager

We were looking for a suitable partner for developing an app and soon found out about DTT. After the first phone call we got a clear picture about the various ways to develop an app and the pros and cons of these options. The offer was clear and good in terms of pricing. We quickly had an app developed that exactly met our needs. Our next app will also be developed by DTT.

Read more about our projects for Welzorg: Welzorg Breakdown Assistance app | RSR Breakdown Assistande app

ADante Business Information

Dave Simons, IT Consultant

"Adante E-meeting provides solutions for paperless meetings of your organization. Together with DTT, we have developed an app that allows the user to keep the documents for the current meeting and agenda on the iPad. With the app, you can also add annotations in the documents.

We spoke with a number of vendors and selected DTT. DTT sets itself apart with their strong involvement in the development of the app. DTT thinks, looks for the best solution and gives an honest opinion where necessary. Jeffrey and his team communicate quickly and completely so you always have everything under control, and you never have to wonder how's it going. In short, DTT has been an excellent partner, and we will continue to co-operate with DTT for the further development of the app especially."

Read more about our project for Adante: Adante E-meeting app

Saint Gobain Glassolutions

Jeroen Thuis, Marketing Manager

Glass Solutions was looking for a flexible company that could quickly develop an app. We've sent out our assignment and DTT reacted accurately and fast. Also during the fulfilment of the assignment they maintained a great service level. The realization of the app on Android and IOS, both phone and tablet is completely provided by DTT. Co-operation with the DTT team was excellent, with adequate and clear communication. Glass Solutions is a satisfied customer.

Intermac BV

Bart Willemse, Owner

We approached DTT for the development of an internal iPhone app, we knew exactly what we wanted and what the challenges were. Several other app developers promised that they could deliver this app as well, but DTT was the only company that showcased that they could develop this application with the help of a video. This gave us the proof that we we’re talking to the right company, and that is proven! Quick and correct responses to our questions and no fuss with minor changes. In short, we will certainly use their services more often.

MobiGreen, Vanenburg Group BV

Henk de Vreugd, General Manager

"For the development of our MobiGreen mobile application we have chosen the services of DTT. In hindsight, the right choice. Our experience with DTT is:

Quick feedback
Comprehensive answers
Good technical expertise
Reliable partnership with modern approach
Proper price/ performance ratio

Hopefully we will have many years of pleasant co-operation."

4Sight

Mark Berntssen, Sales and Marketing Manager

4Sight develops Virtual Reality for the urban planning industry. Thus we support and advise governments and developers in marketing their plans. With visualizations you can create more understanding, trust and support for the property development and infrastructure projects. We have asked DTT to extend our pallet of visualization products by an iPad application for infrastructure projects. Besides the very pleasant and open collaboration, DTT offers a quality product, with fast delivery terms at a very competitive rate. Multiple suppliers are able to deliver quality, but next to that, commitment and customer orientation in favor of the client is a second nature for DTT!

MILK Strategy & Finance

Laurens Oosting, Consultant MILK Strategy & Finance

MILK Strategy & Finance is one of the most prominent strategic and financial consulting companies for small and mid-market. Our services include: Financial Management, Mergers & Acquisitions and Strategic Management. We have worked with DTT on the development of a new strategy to advance the website of one of our customers. The speed and service provided by DTT makes them a pleasant business partner to work with.

Minicards

Arnold Gruppen, Owner

We decided to build a Mobile application to provide our advertisers with an extra platform and to react on the current consumer demand. For this project we approached DTT. We are very satisfied with the short delivery time that was needed to finish the application. The level of communication was above expectations as well. In fact, they chased us more, than we needed to chase them to finish this project :) The result is very pleasing. Next to that, the after sales service was just great.

We are happy to help you with a consultation We are happy to help you with a consultation

Call 020 331 5848

Request a quote

Make an appointment

Email us

Request a quotation

Do you have a plan to develop an app, web or game solution? Then please fill in the form for an offer or cost indication. We will get in touch with you shortly.

Make an appointment

Would you like to meet the specialists of DTT? DTT is located at Sint Nicolaasstraat 9 Amsterdam. Fill in the form and we will get in touch with you shortly.

Thank you

We have received your request for an appointment and will call you back in max 2 business days.

In a hurry? Give us a call +3120 331 5848

Thank you

We have received your request for an appointment and will call you back in max 2 business days.

In a hurry? Give us a call +3120 331 5848

Projects that we
are proud of

view all projects

With ziekenhuisbed-checker.nl there is always room for good care

The Stories connects the global Randstad team

With these smart global solutions HG works better than ever

King Penguin makes everyone protector of the Antarctic Sea

view all projects

More projects

Show all

Canteen Scan: tailored advice for a healthy canteen - DTT apps

The Netherlands Nutrition Centre Canteen Scan

Tailored advice for a healthy canteen

Ontdek MBO

The exciting game through which aspiring MBO students find their ideal education

Fly Me to the Stars VR

Exploring the solar system with Virtual Reality

Ziekenhuisbed-checker

Finding care beds smartly and quickly

Randstad Configurator

Global Human Forward

The Netherlands Nutrition Centre Canteen Scan

Tailored advice for a healthy canteen

Operatie Z.U.I.V.E.R.

Fighting litter together

Randstad The Stories

Bringing a global team together for the 60th anniversary

KNHS Dressage app

iPhone – Android – API – CMS

RIVM Tickbite

Awareness app

iPhone – Android – API - CMS

OSR Star Finder 2.0

Discover the night sky in Augmented Reality

Greenpeace AR

Greenpeace app

Greenpeace protects Antarctic Sea with Augmented Reality

ING

Marketing day app

iPad - API - CMS

Porsche

E-learning game

Web – CMS

KvK Start2Import e-learning app

Chamber of Commerce helps entrepreneurs with import missions via e-learning

Hebban app

Books community app

The largest community of readers in the Netherlands

Air Combat Command

Defend Dutch airspace in this exciting serious game

Bouwend Nederland e-learning tool

Tablet – API – CMS

FOX Sports

Camera app

iPhone - Android - API - CMS

MBO Heroes

MBO puts itself on election agenda with this search board

Fly Me to the Stars VR

Exploring the solar system with Virtual Reality

Hulpapp

The first helpline app for domestic violence

LVNL

Manage air traffic control in this innovative game

Supreme Nudge

A five-year study on healthier lifestyles

Edu Play Book

Learn to read and do math with 100+ stories and games

HHNK Clean Water Facebook game

Educational about water and climate - play directly in the Facebook feed

KPMG

Fine app II

iPad - API - CMS

Bam builds safely

Web

Real-Time Road Inspection

A sustainable solution for a safe road network

Zo Erg Nog Niet

Scientific well-being research with a customized app

HG Sales app III

Sales app III

Boosting efficiency of HG sales

HG Shelf Information System (SIS) - DTT apps

HG (SIS)

Shelf Information System

Digital guidance in the supermarket - deployed worldwide

Philips Android TV weather app

Android TV

Welzorg

Assistance app

iPhone – iPad – Android – Tablet

HG

Webshop

A global webshop for HG's products and promotions

UWV

E-learning game

Web

A'DAM Tower Members Club

Android - iOS - CMS - API

Middin

Sex education app

iPhone

I amsterdam

Maps & Routes

Spreading tourists across the capital with a smart app

Fruitbuit app

Hybrid – iPhone – Android – API – CMS

Healthy Football League

Fitness community for healthy soccer fans

Krasloten

December calendar

Hybrid – iPhone – iPad – Android – Tablet – Web – API – CMS

St. Jude Medical

Game

iPad - Web - API - CMS

Compas-Y

Digital support for a cancer diagnosis

Holland Play and Match app

iOS - Android - Unity - CMS - API

Famiflora

Loyalty app

The loyalty app that connects & rewards green thumbs. For a growing and flourishing customer base

RIVM Respondent Driven Sampling

Secure and GDPR-proof questionnaires among hard-to-reach audiences

VoNo

Voice-to-Note

Quick and simple memo creation - a hit with 100k+ downloads

Check your safety app

Hybrid – iPhone – iPad – Android – Tablet – API – CMS

Jellinek Minnesota

Support and connection for addiction recovery

Erasmus MC

Clinical Challenge app

Challenging and guiding medical students

Flamma

This solution helps field staff quickly go from scan to quote

VakantieVeilingen

Scratch game

Web – API – CMS

Kruitbosch order app

Scan and order the products from Cortina and Alpina with this convenient app

Panorama Netherlands

iOS - Android

Hoefnagels Export Portal

Web - CMS

Hoefnagels Partner Portal

Web - CMS

Vormats

iPhone – Android – Web - API - CMS

Zodify spiritual platform

iPhone - Android - API - Web - CMS

Selfcare

All your health data in one convenient dashboard

E-Moodboard

Physical and app go hand in hand to map emotions

GRIP

Real Estate Manager

Web - PWA - CMS - API

SportWallet

Strava link: from miles to discount points

Doula

Labor coach

The world's leading app for birth support

RefCom4all referee app

iPhone – Web

Municipality of Medemblik procurement tool

An accessible PWA makes procurement faster and easier

Locum

Android - iOS - Web - API

Thuis bij Muis

Reading app

iPad – Tablet – API – CMS

Band Universe

Web - CMS

Show all

We are happy to help you with a consultation We are happy to help you with a consultation

Call 020 331 5848

Request a quote

Make an appointment

Email us

Request a quotation

Do you have a plan to develop an app, web or game solution? Then please fill in the form for an offer or cost indication. We will get in touch with you shortly.

Make an appointment

Would you like to meet the specialists of DTT? DTT is located at Sint Nicolaasstraat 9 Amsterdam. Fill in the form and we will get in touch with you shortly.

Thank you

We have received your request for an appointment and will call you back in max 2 business days.

In a hurry? Give us a call +3120 331 5848

Thank you

We have received your request for an appointment and will call you back in max 2 business days.

In a hurry? Give us a call +3120 331 5848

Create an app

The Royal Navy Days

Greenpeace AR

Air Combat Command

MediaMasters

Custom software development

Data-driven strategy

App maker

Talk with our digital experts Talk with our digital experts

Request a quotation

Make an appointment

Thank you

Thank you

Why create an app with DTT?

Extensive experience across various industries

Different types of apps

iOS apps

Android apps

Creating an application in 4 steps

Creating an app with DTT

Frequently Asked Questions about creating an app

Testimonials from our clients

We are happy to help you with a consultation We are happy to help you with a consultation

Request a quotation

Make an appointment

Thank you

Thank you

Projects that weare proud of

With ziekenhuisbed-checker.nl there is always room for good care

The Stories connects the global Randstad team

With these smart global solutions HG works better than ever

King Penguin makes everyone protector of the Antarctic Sea

More projects

The Netherlands Nutrition Centre Canteen Scan

Ontdek MBO

Fly Me to the Stars VR

Ziekenhuisbed-checker

Randstad Configurator

The Netherlands Nutrition Centre Canteen Scan

Operatie Z.U.I.V.E.R.

Randstad The Stories

KNHS Dressage app

RIVM Tickbite

Awareness app

OSR Star Finder 2.0

Greenpeace AR

Greenpeace app

ING

Marketing day app

Porsche

E-learning game

KvK Start2Import e-learning app

Hebban app

Books community app

Air Combat Command

Bouwend Nederland e-learning tool

FOX Sports

Camera app

MBO Heroes

Fly Me to the Stars VR

Hulpapp

LVNL

Supreme Nudge

Edu Play Book

HHNK Clean Water Facebook game

KPMG

Fine app II

Bam builds safely

Real-Time Road Inspection

Zo Erg Nog Niet

HG Sales app III

Sales app III

HG (SIS)

Shelf Information System

Philips Android TV weather app

Welzorg

Assistance app

HG

Webshop

UWV

Projects that we
are proud of