Heiko is coming.
My father-in-law visits California for the first time this summer.
He grew up in East Germany, learnt Russian at school, and doesn't speak English.
I built this so he can go out alone.
Second goal: become the favourite son-in-law.
2026
Family software
Built alone, over a few weekends
Interaction Design, iOS Engineering,
Real-Time Speech Systems
Gemini Live API
Written with Claude Code
Heiko is coming.
My father-in-law visits California for the first time this summer.
He grew up in East Germany, learnt Russian at school, and doesn't speak English.
I built this so he can go out alone.
Second goal: become the favourite son-in-law.
One button. Waiting, listening, mid-conversation.
German is always the big text, whatever language comes in.
California is not only English. Six languages, any pairing.
The hard part was never the translation. It was knowing who spoke.
Software used to be too expensive
to build for one person.
That has changed.
He speaks and reads German and is not technical.
Every decision follows from one person.
37 logic tests. 56 replay assertions against the live API
Put it on your own phone: TestFlight ↗.
