A production-ready React + Expo frontend for building B2B invoice tools. Ships with invoice upload (image + PDF), AI extraction flow, a three-check verification UI (amount / date / duplicate), a line items data grid, and CSV export. Unlike generic templates, this kit includes real B2B workflows: Supabase RLS setup, PDF-to-image pipeline, multi-step verification states, and a ledger UI. What you need to add: your own Supabase project and your own AI model API key. Setup takes about 15 minutes.