This app is the best focus app that exist, with the free apps, it doesn’t really matter if you are on your phone, because the only thing you are missing then is the coins/diamonds. But by this app you lose ofc the coins, but your tree is also dead. And then you have forever a dead tree in your forest. You can get it away, but that cost soo much coins that it is not really worth it. You can also study with friends, and when one friend is on his/her phone, all the trees of all the friends your studying with are DYING so this app is really helpful for focusing. love it so much, the money is absolutely worth it!