Multi Facility Super App Build

I need a single mobile application that lets users manage several services in one place. The core modules must cover online admission submissions, parcel or food delivery, document correction requests, and fashion-related bookings or purchases, all tied together with secure bill-payment and money-transfer options. In short, the app should truly manage several services in one app—from payments to bookings to delivery—so users never have to leave the platform.

Scope of work
• User apps for iOS and Android (or a solid cross-platform alternative such as Flutter or React Native)
• A provider/admin web dashboard for tracking orders, admissions, and service tickets
• Payment-gateway integration, real-time order tracking, push notifications, and role-based access
• Distance-based fee calculation for deliveries, ticket numbers and status updates for document correction, data collection and receipt generation for admissions, and catalog plus time-slot booking for fashion services

Deliverables
1. Full source code and build files
2. Deployed apps ready for App Store and Play Store submission
3. Backend/API with database schema
4. Admin & provider panels
5. Setup documentation and a brief hand-over session

Please share any similar multi-service or super-app projects you have completed and the tech stack you suggest so we can finalise milestones promptly.