You automatically earn 3 free spins every day. You can also buy the spin daemon, which will give you an additional 3 spins every day on the avatar that you purchased it on.
To get free spins, you can watch up two video ads every day, which will give you one free spin each. You can do this by tapping the 'Play' button in the bottom right of the screen. You can also win more spins in the Loot boxes.
You can purchase more spins from the ‘buy spins’ button in the middle of the screen.