Independent Apps

Besides working for clients, I love building my own apps. This is where I can follow my own passion, experiment with new ideas, and create things that I believe people will enjoy using.

One of my most well-known apps is Snake '97, a simple retro game that brought back a classic phone game for a new generation. It became a huge hit, with over 40 million downloads worldwide. This amazing journey gave me the chance to work directly with the teams at Apple and Google, visiting their offices and learning how the global app stores really work from the inside.

Updating Snake '97

Updating Snake '97

About the challenges of developing a wildly popular game

Few years ago my brother threw a beer on my iPhone in an Amsterdam bar. The poor thing didn't like the Dutch brew as much as I do: it died. While waiting for a new phone to arrive, I used an old one that couldn't do anything but texting, calling and... Snake! The idea for Snake '97 was born and this month it was time to update the wildly popular game.

My latest passion project is Gran Fondo, an app for runners and cyclists. But it's more than just a workout tracker. In a world where your personal data is often sold, Gran Fondo is built on privacy and the idea that you should always own your own information. My goal is to make it completely open source, so it can be a free and honest tool for everyone to use, share, and improve.

Open-Sourcing Gran Fondo

Open-Sourcing Gran Fondo

A Leap to Libre Fitness and Freedom

Gran Fondo, the app that tracks runs and rides, is going open-source. I’m removing its subscription model and make it libre. This isn’t about short-term revenue—it’s about building something enduring, private, and free for all. Here’s why I’m taking this plunge and what’s next.

Developing a native iOS app

Developing a native iOS app

Making a cycling and running tracker

As a little side-project, squeezed between my normal work, I have been working on something of personal interest: a native workout tracking app for iOS. I wanted to make my smartwatch obsolete, instead using my phone to track workouts. How hard could it be to gather detailed sensor data using native Swift APIs?

Have an idea for an app that could make a difference, or just be a lot of fun? I'm always open to exploring new concepts.

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