I published my first two apps, party games, at 16. Another followed in 2024, GymTracker and Paperkeep in 2026. I build an app when something bugs me in daily life and nothing out there fits.
Before, I logged every workout awkwardly in the Notes app. The apps on the store did not match what I wanted, and I did not want to depend on a provider without knowing what would happen to the app. Now I log sets in seconds, see my progress and train with Apple Watch.
With lots of letters and invoices you lose track quickly. I am a big fan of going paperless, but nothing may get lost, and I want to search for anything, anytime, anywhere. Paperkeep scans, recognises the text right on the device and keeps deadlines and warranties in view.
The mileage log that keeps itself. Trips are detected automatically, analysed locally on the iPhone and show up in widgets and on the lock screen.
The ideas come from my own day: training, paperwork, driving. I sketch flows and screens, write the copy and decide what goes in and what stays out.
I write the code in SwiftUI with AI tools, then check and test it on real devices. Translations, screenshots, store copy and the submission to Apple follow.
We reply personally, in German or English.