Convert a native android java app to react native app which is an android and ios app - Settings Page

You will be given the source code of the native android app which is to be used on a bluetooth device. You must know android java code as no technical assistance will be provided. Please make sure the app which is available on google play store works on your mobile before accepting the project.
This is a series of projects. Each project is a creation of one of the main pages of the android java app. When you have satisfactorily finished one project, you will be awarded the next project. The different projects are :
-Main activity page and settings page and its subpages (S$200)
-More functions of Main activity page and subpages (S$300)
-Device activity page and its subpages (S$150)
-More page and its subpages (S$150)
-Integration and improvement project (S$200)

This project is the Main activity page and settings page and its subpages. The function required of Main activity page is display followed by links to settings page. The value is S$200

Before you begin, you have to describe the architecture. It should contain navigation, action, redux, screens.
Source code has to be submitted to check that the code is well written in a structured manner.
The code will be tested and there should be no bugs before payment is made.