Posa Xrosto

Posa Xrosto (Greek for "How much do I owe?") is a Progressive Web App that solves the problem of splitting restaurant bills when the group shares dishes. Instead of dividing the total equally, which is unfair when someone had a steak and someone else had a salad, the app calculates each person's share from the items they actually shared. Users follow a step-by-step flow: set the number of people (2–20) and their names, add bill items (manually or by scanning a receipt with the camera), assign who shared each item, and get an instant per-person breakdown. Optional AI receipt scanning uses GPT-4o Vision to extract items and prices from a photo so there's no typing. Results can be shared via native sharing or clipboard, as a full breakdown or totals only. The app is mobile-first and installable as a PWA with offline support, so it works at the table. It's built with Next.js and TypeScript, styled with Tailwind CSS and shadcn/ui, uses Framer Motion for animations, and exposes an API route that calls OpenAI for receipt OCR. The goal was a clear, fair, self-serve bill split that avoids awkward math and keeps splitting fair for everyone.