Sven Thoennissen

I am a freelancer in software development for mobile iOS/iPadOS apps.
If you have an idea for an app for your startup or your company I will gladly assist you with my experience and suggestions. I am located in Oud-Heverlee, Belgium, but I am natively from Germany.

Check out my apps which I have developed at my own initiative or for customers.


Grand Dice app icon Grand Dice
A casual dice game with special game modes for a traditional dice game.
MIDI Sniffer app icon MIDI Sniffer
Capture and export MIDI data for inspection, troubleshooting, or development.
Turbosounds app icon Turbosounds
Designed for accordion players to play digital instruments such as basses, guitars, accordions (diatonic or regular), brass, and other traditional instruments at home or on stage. The app also offers a player for MIDI files, styles, and audio files, and several functions specific to accordions.
Jazz Master Tracks app icon Jazz Master Tracks
Play along a number of great jazz tracks to hone your improvisation skills. Learn to play challenging solos with your own instrument.