FlipLedger is the all-in-one inventory, profit, and tax tracker built for resellers across eBay, Poshmark, Mercari, Depop, Vinted, and Etsy. Auto-calculates marketplace fees, net profit, ROI, and days-to-sell. Features dashboard charts, stale stock alerts, monthly P&L reports, one-click CSV import from existing spreadsheets, and tax-ready export. Installs on your phone, works offline, and requires zero recurring subscriptions. Pay once ($29) for lifetime access.