FieldCollect

Zero data loss guaranteed with Outbox pattern and WAL-mode database writes. If battery dies mid-write, data recovers on next boot. Even if phone overheats and shuts down in 40°C heat, no data is lost.

100% offline operation. Forms, GPS, camera, and signatures all work without internet. The server is optional. Field agents never see a 'No internet' error because connectivity is an enhancement, not a requirement.

Resumable sync engine. If an agent syncs 50 submissions and walks out of WiFi range at #37, sync resumes from #38 when signal returns. Never starts over. No button needed, sync happens automatically.

Web admin dashboard with drag-and-drop form builder and interactive map view. Managers build forms in 2 minutes with 20+ field types. Same JSON form renders on both web dashboard and field PWA.

Three service worker caching strategies ensure the app loads INSTANTLY even on 2G networks. Cache First for app shell, Network First for form definitions, Stale-While-Revalidate for reference data.