Android Productivity App Development

*1. Client & Onboarding** - Client/business profile: name, contact, address, GST number, onboarding date - Client status: active / paused / terminated - Contract/agreement start & end date, auto-renewal flag **2. Dispenser Management** - Dispenser master: ID/serial, model, install date - Assign one or multiple dispensers per client - Security deposit per dispenser + refund tracking on termination - Dispenser service/maintenance log (breakdowns, cleaning visits) - Idle/unassigned dispenser inventory report **3. Plans & Pricing** - Monthly rental amount per client - Free refill count/month - Extra refill charge per container - Price revision history (so past bills don't recalculate at new rates) **4. Daily Operations** - Daily delivery entry: client, date, containers delivered, delivered by - Empty container return tracking (issued vs returned, prevents loss) **5. Billing Engine** - Auto monthly bill: rental + (refills beyond free count × extra charge) - Free refill counter resets each cycle - Pro-rated billing for mid-month start/end - GST-compliant invoice (CGST/SGST split) Optional - Late payment penalty rules (optional) **6. Payments** - Payment tracking: paid / unpaid / partial - Payment date & mode (cash/UPI/bank) - Outstanding dues / aging report **7. Reports** - Monthly billing summary (all clients) - Client-wise consumption trend over time - Revenue report (rental income vs refill income) - Delivery report (daily/weekly/monthly volume) - Dispenser inventory report **8. System/Admin** - Simple admin login/passcode - Data export& Import to Excel/PDF (for accountant) - Periodic backup/export of full database in google Drive And extra other Features