Master branch:
Develop branch:

This is a usual Android app, and you can just clone the repo and build it using Gradle.

$ git clone https://github.com/thebestory/android

There is no license yet, that means you have no permission to use, modify, or share the code of app. But you are free to explore the code. If the app will be open source, there is a high probability that the open source license will be applied to the it.