I need a lean, working MVP that lets me create bills by voice and instantly share a PDF on WhatsApp while storing every transaction in a central database. Core flow 1. The user (Admin, Manager, or Customer) taps a mic icon, speaks item names and amounts, and the app converts the speech to text in English, Hindi, or Hinglish. 2. A clean bill preview appears, ready to save as PDF. 3. With one tap the PDF is sent through the device’s native WhatsApp share sheet. 4. Each bill, user, and role-based action is written to a cloud database so basic reporting is possible later. Key requirements • Platforms: Android and iOS from a single codebase (Flutter, React Native, or similar—open to your recommendation). • Roles: Admin can see everything, Manager sees team activity, Customer only sees personal bills. • Lightweight login (mobile number + OTP or similar). • Simple dashboard listing recent bills with search/filter. • Source code, build instructions, and a brief setup guide delivered on hand-off. Keep the UI straightforward; focus effort on accurate speech-to-text, reliable PDF generation, and WhatsApp sharing. Once those pillars are solid I can layer on extras in a later phase.