Helps me focus :)

This is a great app! Ive had it for a while now and use it every time I need to work! I just have a couple suggestions; It would be great if you could whitelist certain apps because sometimes I do need to use my phone to work, and then I have to wait until the timer runs out so I dont kill my tree. It would also be really interesting if you gave each type of tree a certain perk, like it gives you twice as many coins or something like that. Even though this app is supposed to be simplistic and easy to use, maybe do something to make the task of focusing a little more gamified than just earning coins that you can plant trees with.
Another thing is, gaining enough coins to plant a tree takes forever!! (At least for me) it would be great if you could maybe lower the price? I want to know that Im making an impact :)

P!atd.fob.mcr about Forest: Focus for Productivity