I operate a small café and snack corner and need a lean Android-based POS billing solution to replace my manual register. The app must run smoothly on a tablet while remaining fully navigable with a plugged-in keyboard or mouse, so every screen should respond comfortably to both touch gestures and conventional pointers. My single must-have feature is solid Sales Reporting. I want daily, weekly, and monthly summaries, item-level totals, GST breakdowns, and a one-tap option to email or print the report as a PDF. Inventory, loyalty schemes, and other extras can stay out of scope for now—we’ll keep it quick and uncluttered. Key functional expectations • Clean product list with price, quick-add buttons for fast-moving items, discount/tax fields, and a receipt that shows my café logo. • Local data storage (SQLite is fine) with an optional Google Drive backup. • Printable receipts through Android’s native print service. Deliverables • Install-ready APK that supports Android 8+. • Complete source code (Kotlin/Java or Flutter/React Native—whichever you prefer) with a short build read-me. • User guide covering item setup and sales report retrieval. Acceptance criteria • App is equally usable via touch and keyboard/mouse without crashes or layout glitches. • Sales reports export accurately and mirror test transactions. • Receipts print clearly from an Android print dialog. I’m aiming to test an early prototype in the next couple of weeks and iterate from there.