What is the best way to build a React Native chat app?

Question

Chats

The bottom line is that this application will only be used by 2 people, i.e. I need as much as possible on what is the best way to write back and how to send messages between 2 people.

Answer 1

In general, do not write back if there are only 2 people. Use Firebase. there are ready-made functions for working with it. Roughly speaking, firebase provides you with both api methods for working with it and the base itself for storing correspondence, i.e. perfect option for you. https://rnfirebase.io/ here is a library to work with it.