Building
Everything I have shipped so far, newest first. Some of it is still running, some of it taught me something and then stopped.
App Starter2026
An Expo template for iOS and Android with onboarding, login, paywall, an AI screen and English plus German, every backend mocked so it runs right after cloning. Open source.
jointable.app
Hey Kalo2025
Calorie tracking by voice. You say what you ate, the app does the rest. Taught myself React Native for it, shipped to the App Store and Google Play, profitable within six months and without an ad budget.
Sunday Runday2025
A running club in Munich. Weekly social run through the Englischer Garten, brunch after.
VerbraucherCheck.net2017
The consumer side of Lead-Kraft. People describe their problem, the platform matches them with a lawyer or financial advisor. Several thousand people helped in the first two years.
Lead-Kraft2017
My first company, co-founded. Lead generation for lawyers and financial advisors, built on the VerbraucherCheck platform. I ran it until 2020. It still exists.