برمجة تطبيق أندرويد Native

I need a complete, native Android point-of-sale application that rivals Loyverse in day-to-day usability yet runs entirely on smartphones. The core build must handle products, invoices, customers, inventory and reports out of the box. All data is to be stored on my own servers, with a PHP-based back-office site where I can add items, view sales and generally administer everything.

Key requirements

• Works offline first; the moment a connection is available the app must push and pull changes so that the handset and the PHP site stay in near real-time sync.

• Prints to both thermal receipt printers and barcode printers directly from the Mobile device.

• Barcode scanning from the phone’s camera (or a paired scanner) for quick item lookup and stock control.

• The Mobile Phone build must be optimised for touch on smartphones; tablets and specialised POS terminals are not essential right now.

Deliverables

1. Mobile Phone project with source for Android, IOS

2. PHP/MySQL admin portal with responsive UI.

3. Secure REST or WebSocket sync service tying the two together.

4. Clear deployment guide and short video walkthrough showing offline-to-online data synchronisation and a sample sale printing on both printer types.

Acceptance criteria

• A product added in the portal appears on the phone within seconds once a connection is restored.

• A sale recorded offline syncs automatically without data loss.

• Receipts print correctly on a standard 58 mm thermal printer; barcode labels print with SKU and price.

I will review it with the client and get back to you.