Build a mobile app (Android & IOS)

We want to build a grocery mobile application with the below features

1. Order Management
2. Inventory Management
3. Multiple outlet management - Including store pickup & delivery based on the location of the user
4. Delivery Management
5. Loyalty Points Sytem
6. Discount Coupon Management
7. Wallet
8. Complaint Management
9. Payment gateway Integration
10. Mobile POS