Inventory 360 is a browser-based POS and inventory system built local-first: sales, catalog, and customer data live in your browser's IndexedDB, not a remote server. No signup, no subscription, fully offline-capable. Features include barcode/QR POS checkout, multi-outlet stock transfers with escrow tracking, automated purchase orders, lot/batch expiry tracking with FEFO and instant recall quarantine, omnichannel order sync (Shopify/Amazon/WooCommerce), and local JSON auto-backups.