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App development in Leuven

App development in Leuven, from design to ongoing support

Zenjoy designs and builds mobile apps, with one team for design, development for iOS and Android, backend and maintenance. For KU Leuven we built S.Tool, an app that lets patients track bowel complaints after cancer surgery and share them with their doctor. We do the same for research groups, healthcare organisations and companies in and around Leuven.

Your first meeting is free and comes with no obligation. We discuss what your app needs to do, who will use it and the systems behind it.

Three phone screens of the S.Tool app beside a study folder

S.Tool · KU Leuven

An app that helps patients track bowel symptoms after cancer surgery and share them with their doctor. Developed with the research group.

How we build and support an app

An app is rarely just an app. There is a backend behind it, often a dashboard for whoever follows along, and sometimes an integration with systems you already use. We build that side too, host in the EU, and stay reachable after launch for updates and new versions of iOS and Android.

Why have your app built by a studio in Leuven?

At the table, not in a ticket

Our office is at Blijde Inkomststraat 22, ten minutes from the station. Screens and flows are easier to discuss with a sketch between you.

Apps that come out of research

We work with research groups at KU Leuven and with organisations that collect measurement data. We know the questions that come with it: who may see what, how long do we keep it, and what happens to the data after the project.

The backend and administration tools

Behind an app sit a backend, a management environment and sometimes an integration. Anyone who looks at that only after delivery builds it twice.

A team that stays

Apps age faster than websites: every year brings new OS versions and new store rules. With Platform & App Care, updates, monitoring and the submissions to Apple and Google stay with us.

Mobile app development and supporting software

Mobile apps

Native or hybrid, for iOS and Android, with attention to what has to work offline and what does not. We also handle submission to Apple and Google.

Have an app developed
UI/UX design

We design screens on real content and real users, not on a template. We test the flows with the people who will use the app every day.

Discover our UI/UX work
Web platforms

The management environment behind your app: users, roles, records and reporting, connected to what you already use.

Have a web platform built
Platform & App Care

After launch: updates, monitoring, backups and new store releases, with a person who knows your project.

See Platform & App Care

Apps we built from Leuven

More case studies
Screens of the Maar Allee app
Scivil · Leuven

Maar Allee: collecting Flemish speech with citizens

A citizen science app volunteers use to record speech fragments, so AI systems learn to understand Flemish voices too.

Read the case
The S.Tool app in a patient’s hand
KU Leuven

S.Tool: helping patients discuss bowel symptoms after cancer surgery

An app patients use to track their complaints and share them with their doctor, developed with the research group that wrote the questionnaire.

Read the case
The Phonebox setup in the field
KU Leuven MeBioS

Phonebox: from lab to field

AI insect detection that left the lab: images from the field, recognised automatically, with a management environment for the researchers.

Read the case

Visit us, or we come to you

A first conversation takes an hour and costs nothing, by video call or at our table. We look at what the app has to do, for whom, what has to sit behind it and how long it has to last. After that you get a quote stating what is included and what is not.

Our office is at Blijde Inkomststraat 22, 3000 Leuven. From the station it is 750 metres, a ten-minute walk. You can park at Ladeuzeplein, 200 metres away.

A look through the door of the Zenjoy office in Leuven

Questions we often get

That depends on what the app has to do, whether it has to work offline, which systems it needs to connect to and how many screens there are. We estimate it in the first conversation and put it in a quote, including what is not part of it.

An app is worth it if you need the camera, location, notifications or offline use, or if people open the application every day. Otherwise a website that works well on a phone is faster to build and cheaper to maintain. We will say so if that is enough for you.

Yes, usually both, from one codebase. Where the difference matters, we design per platform.

We do, on your developer account. The app stays yours, also if you continue with someone else later.

Often. Maar Allee came about with Scivil, S.Tool and Phonebox with research groups at KU Leuven. We know the rhythm of research projects: ethical approval, a pilot phase, and a publication the planning works towards.

Apps age faster than websites. Every year brings new OS versions and new store rules. With Platform & App Care we take on updates, monitoring and new submissions.

A bit of both, and neither entirely. Zenjoy is a digital product studio: we design and build websites, web platforms and apps, and we maintain them afterwards. For networks, laptops and Office an IT company serves you better.

An app built in Leuven?

Tell us briefly what the app has to do and for whom. We’ll discuss what your project needs, in person if you prefer.

Discuss your app

Speak directly with someone who can discuss your project in detail. No obligation.

Rather see what we build first? See our work