Gastolens

Gallery

About

GastoLens is a production-ready personal finance PWA that removes the friction of expense tracking. Users type or speak a natural phrase — "dinner with friends 45 euros" — and the built-in NLP engine automatically extracts the amount, detects the currency, and assigns the right category. No bank connection required. No complex setup.Key highlights:Custom Spanish NLP engine built from scratch in vanilla JavaScript — handles slang, numeric word forms and multi-currency (EUR, RON, USD). No third-party AI APIs, no usage costs.Full PWA: offline support via Service Worker, installable on iOS and Android, safe-area support for iPhone Dynamic Island.React 18 + Vite 5 + Supabase (PostgreSQL + Auth + Realtime) + Vercel. Runs at $0/month on free tiers.Real-time sync across devices, voice input via Web Speech API, interactive charts, full expense history.Row Level Security enforced at database level — each user can only access their own data.The Spanish-speaking market (500M+ speakers) has no dominant privacy-friendly expense tracker. Mint shut down in January 2024, leaving millions of users without a free alternative.Monetisation is straightforward: adding a Stripe paywall takes approximately one weekend. The infrastructure is already cloud-based and user accounts are fully managed.The buyer receives full source code, Supabase project transfer, Vercel project transfer with CI/CD, SQL schema, RLS policies, and technical documentation in PDF.