David Bohrisch
I build web apps that keep people connected without ads or tracking – and tools that run AI entirely on your own machine. Everything self-hosted, everything self-operated.
A family album for pets. Littermates, parents and grandparents usually live with different families – a pedigree tree, a timeline and a shared board keep them connected.
- Multi-generation pedigree – litters and lines are derived automatically
- A timeline per animal with photos, milestones and comments
- A pinboard for meetups and a “New in the pack” feed
- Invite-only: families with roles, private entries stay at home
- Printable collages, installable as an app with push
- No ads, no tracking, no third parties at runtime
Quiz with friends – no ads, no account. On your phone, on desktop with the space bar as buzzer, or several players at one PC.
- Fair buzzer with clock sync – the question hides while someone answers
- Modes: buzzer, type-in, estimation, duel, world map, timeline
- Nearly 2,000 questions in 25 catalogs, from easy to hard
- Three levels of typo tolerance, every question can be challenged
One desktop app for everything your GPU can do with open models – chat, image, video, voice, datasets and LoRA training. Fully offline once installed.
- A scheduler that knows your real VRAM and places models
- SHA-256 verified downloads, packages instead of loose files
- LoRA training with previews, pause and resume
Workbench
Smaller projects and experiments – not public, but built.
- csi-scopeDetects motion and breathing in a room from WiFi signals – with a ~€10 ESP32.Python · ESP32
- Interview-TrainerPractice for technical interviews, answers graded by Claude.React · Anthropic SDK
- Restaurierungs-SimulatorGame prototype: job, repair minigame, rating, progression.TypeScript · SVG