FlipperHelper

FlipperHelper is a photo-first profit tracker for resellers who flip at car boot sales, charity shops, and flea markets.

Snap a photo, set your buy price, and save an item in seconds. When it sells, log the sale price and platform — FlipperHelper shows your real profit after fees, entry costs, and transport.

Features:
- Photo-first item tracking (no typing SKUs)
- Profit per item (buy vs sell, in your currency)
- "Days to Sell" on every item
- Tracks listings across 16+ platforms (eBay, Vinted, Depop, Facebook, Etsy, Grailed, Gumtree, Mercari, Poshmark, and more) — this is a tracker, not a cross-lister
- Expense tracking: entry fees, transport (car/taxi/train), packaging
- Monthly dashboard: Sales, Costs breakdown, Net Profit
- Multi-currency (buy in EUR, sell in GBP, auto-converted)
- GPS market detection — save locations, auto-suggest when nearby
- Export to Google Sheets (CSV uploaded to Drive)
- Works fully offline — everything is local JSON, no network required at markets
- Background image sync when you're back on Wi-Fi

Built by a solo Python dev for his wife, who resells at UK car boot sales and hated subscriptions and flaky offline UX. iOS and Android.