DGT Reporting - React Native App Development

This project is to,
Report medical representative movement within certain location using react native based mobile app.

There are few medical representative who meet doctor and other medical persons through out the day across city in many hospitals\clinics and chemist.
We wanted to create a mobile App which keep track of a particular medical representative movement
from one location to another and note down which medical representative\doctor he meet and for how long
along with what he has proposed to medical representative.

Backend with Java and front end UI using React app is already developed,
Ask here is to build React Native Mobile App (this App is semi developed) which is using same java backend.

We need to Enhance this Mobile App to more screens\pages to be developed and wanted help in generating expo based APK package....

Screens to be developed,
1. Person movement from one location to another and record the movement using backend api
2. Draw past day movement data on map for any medical representative
3. Few masters has to be created in mobile app
4. Expo based Based APK package needs to be created...

See that most of above is created in desktop browser based react app, we need to develop mobile app based screens