This project is the sample app for the Room course on Caster.io. You will want to watch the full course there which will explain all of the code in this project.
This project is structured such that each lesson in the Caster.io course will typically add new code to the app. As such, we maintain a branch per lesson so that you can jump to any branch at any time.
The master branch is synced to the latest branch, and so will always be the most up to date.
But as you're watching the lessons, you can jump back to a previous branch so you can watch the sample app evolve along with the lessons.