I built a voice-to-invoice bot for German construction companies
No App, No typing, No training needed... Just speak --> get a professional PDF Invoice in second. Here the workflow : 1. Contractor sends a voice message on Telegram 2. Whisper AI transcribes it 3. GPT-4 extracts items, quantities, prices 4. A professional PDF invoice or Angebot is generated automatically 5. Bot sends the PDF back instantly on Telegram Full stack running in production: → n8n on Hetzner VPS 🇩🇪 → HTTPS via domain kinvoice → Telegram Bot as the UI → html2pdf for document generation → Multi-document support (Rechnung + Angebot) The contractor doesn't need to learn any software. They just talk. The bot does the rest. This is what I'm building for German SMEs — simple AI automation that saves hours every week. Onboarding first customers now.