I need a complete Android-based point-of-sale application that can be rebranded for different clients. All source code must be handed over so my team can swap logos, splash screens, and basic colour accents without touching the underlying logic. Core workflow requirements are straightforward: process walk-in sales smoothly, keep real-time inventory counts accurate, store essential customer details for repeat business, and generate clear on-screen and printable bills. The interface should feel classic and simple—think tidy screens, large touch targets, and minimal ornamentation—yet leave room for our logo and a primary brand colour. The build has to expose at least one clean way to push daily summaries to external accounting software (REST, webhook, or a small middleware module). If you already have a connector for popular tools such as QuickBooks or Xero, even better; if not, document the endpoints so my developers can plug one in. Deliverables that will mark the job complete: • Production-ready APK plus matching source code that compiles in the current stable Android Studio version • A short white-labelling guide (where to change icons, package name, colours) • Setup notes for the accounting integration endpoint and any keys or libraries used • Sample data set and test procedure showing a sale, stock deduction, and customer record update The code must build cleanly, run on Android 8.0 and above, and stay responsive on both 7-inch and 10-inch tablets.