Retail Solutions
Offline Sales Application
Offline-first sales application designed for environments with unreliable internet connectivity.
Challenge
Sales stop when signal drops
Field agents and retail counters depending on online-only tools lost sales and delayed reporting whenever the network failed.
Solution
Local-first Android app
Sales against a local database, product sync when online, queued uploads with idempotent keys, and mobile printer integration.
Outcome
Sell anywhere, sync later
Agents keep selling without signal; the back office receives data when devices reconnect.
Architecture
Android Sales App
Local DB (Realm / SQLite)
Offline Queue
Sync Upload (when online)
Backend + Receipt Printer
Interface overview
Add screenshots to assets/images/projects/offline-sales-*.png.
Offline sale cart with local product catalog
Sync status and pending upload queue
Tech stack & highlights
Android Java, Realm / SQLite, offline sync, mobile printing.
- Local database
- Product synchronization
- Offline sales
- Automatic upload
- Printer integration