React Native Billing Companion App

I already run a full-featured billing platform on the MERN stack and now need a lightweight companion app built with React Native that talks to my existing REST endpoints. The scope is intentionally tight—three screens that mirror key workflows from the web app.

Inventory Screen
• View and manage stock levels in real time
• Add or remove items on the fly
• Track item categories for quick filtering and search

Invoice Screen
• Create brand-new invoices
• Pull up and edit any existing invoice
• Trigger invoice dispatch by email directly from the device

Report Screen
• Generate sales reports
• Generate inventory reports
• Let users export any report as a PDF they can share immediately

I will hand over the full API documentation, sample payloads and Postman collection so you can focus entirely on the mobile side. The UI can stay native to React Native components; feel free to layer in Redux Toolkit or Context if that speeds state management. Final deliverables are:

1. Complete, well-structured React Native source code (iOS & Android ready)
2. Build instructions plus a short README explaining any environment variables and install steps
3. A release-mode APK or TestFlight build to confirm everything runs smoothly against my staging server

Clean code, concise commits and a short Loom walkthrough will make sign-off quick and painless.