I need a working proof-of-concept that lets a small shopkeeper speak an order and instantly create a shareable bill. Here is the flow I want to see in the demo: • Voice capture in both Hindi and English, converted to text in real time. • Automatic parsing of item names, quantities and prices from that text. • On-screen, neatly formatted bill with total. • One-tap share to the customer on WhatsApp, including a UPI payment link. Credit sales (udhaar) must also be covered. When the shopkeeper says something like “Ramesh — ₹150 doodh + biscuit,” the app should store the amount, set a due date, and support both manual and automatic WhatsApp reminders such as “Dear Ramesh ji, your ₹150 is pending at XYZ Store. Please pay via UPI: xyz@upi.” Target platforms: both Android and iOS—I'm open to a single codebase approach such as Flutter or React Native to stay efficient. For data you can keep it lightweight (SQLite, Firebase, or anything equally simple); I mainly want to see the core logic working. Deliverables 1. Source code and build instructions. 2. An installable test build for Android (APK) and iOS (TestFlight). 3. Short video or screenshots that prove voice entry, bill generation, WhatsApp share, and reminder trigger are functioning. Keep the UI minimal; speed and accuracy of the core features matter more than polish at this stage.