it's a wonderful app to help you focus more on your work or studies. you can select a time of how long you want to focus (you can choose from 10m to 2h) while doing that you also have a wide range of options available of all kinds of trees and bushes! the more time you select the more coins you get rewarded and with those coins you can buy new trees or bushes. i have bought the premium version for €1,99 which isn't much at all and because i have it i can personalise the app blacklist!