Retail
KillaQ Caja
An Android point of sale with inventory, electronic invoicing and offline operation.
Stack used
- Android
- SQLite
- E-invoicing
The technologies this project was built with.
The challenge
A point of sale that stops working when the internet drops is useless in a market where connectivity is intermittent.
The solution
Local persistence in SQLite with an idempotent sync queue. The sale always closes on the device; the cloud catches up afterwards without duplicating receipts.
Results
- Sales complete with no connection
- Offline
- Sync without duplicate receipts
- Idempotent
- Inventory and invoicing on one device
- Integrated
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