Apps and tools
I build.

iOS light meter for film photographers. Reflected and incident metering through the camera, exposure triangle via APEX solver, 49 film stocks and a live film-look preview.

GDPR-compliant team calendar as a web app. Real-time, drag & drop, hybrid auth with token viewer links. Fully self-hosted in Germany.

Native macOS app that reads and analyzes Garmin Edge .fit files locally: form trend, charts, map, power-meter zones and on-device AI — privacy-first, entirely on your Mac.