What I have built and can build for you. Pin & Done and the PDF Nischenfinder. — Proof that I do what I preach.
My first creation. An app for homeowners who want to keep their building records in order — no binders, no Excel chaos, no constant searching between emails, WhatsApp and PDFs.
With Pin & Done, a pile of scattered documents turns into an organized digital building file — sorted with AI, searchable, and shareable anytime with architects, tradespeople or your insurer. A personal problem became a product that hundreds of homeowners rely on every day.
See case study →My newest creation — and a different animal. A web tool that uses real data to show which PDF guides are genuinely in demand right now across Germany, Austria and Switzerland. No more guessing what to write about.
Three steps from a blank page to a ready-to-sell PDF: pick a niche, get an Idea Drop with title, target audience, price and the reasoning behind the trend — and for every idea, a ready-made prompt to copy into Claude, ChatGPT or Gemini. One free trial run, no credit card.
To the Nischenfinder →I build apps for trades, clubs, small businesses and solo entrepreneurs — with AI features if you want them, always GDPR-compliant, always as equals.
We start with the pain point — not with technology. What costs you time every day? What annoys you most? That's where the concept comes from.
First version in weeks, not months. Tested with real users, fine-tuned regularly. Flat rate, no castles in the air.
You become the owner of your app — source code, data, brand. I'll support its operation if you'd like, but you decide where it goes from here.