Android and iOS app for Pharma Sales

I need a full-featured mobile application that will run smoothly on both Android and iOS and support the end-to-end sales cycle for pharmaceutical products. The core idea is to give our field team and partner pharmacies a single, reliable tool for placing orders, tracking product movement, and viewing real-time sales performance.

Here is the high-level scope I have in mind:
• A clean, role-based interface where users can log in, browse our product catalogue with current stock status, create or approve orders, and check delivery progress.
• Dashboards that summarise daily, weekly, and monthly sales numbers, preferably with simple charts.
• Offline mode for remote areas and automatic sync once the device reconnects.
• Basic geo-tagged check-ins so representatives can record customer visits.
• A notification system for low inventory, price updates, and promotional campaigns.

Tech is flexible, but I am leaning toward a single codebase (Flutter, React Native, or similar) to speed up development and keep maintenance costs down. A lightweight, secure backend (Firebase, AWS Amplify, or another modern alternative) is welcome as long as it scales.

I already have a product list in CSV and basic branding assets ready. Once you have signed an NDA, I will share screen mock-ups and a brief user-flow document.

Deliverables I expect:
1. Source code for both platforms.
2. API or database schema with clear documentation.
3. Test build links (TestFlight / APK) for user acceptance testing.
4. A concise deployment guide so my in-house IT can publish future updates.

Timeline is important—ideally, a demo build inside six weeks, followed by a production release after our feedback round. If you have launched similar B2B or pharma-focused apps, that will be a big plus. Let me know what you would use for project management, your preferred communication rhythm, and anything you need from me to get started.