This app is so good for keeping track for your studies and how much time you need to. I have my personal to do list the app. The only problem is that if I don't study on weekends, which I don't, it gives the bunny less happyness. Because at the top of the screen there is a happy bar that shows hoy happy your study bunny is, and if you don't study, it gets sad. That is the only problem and I hope that in the future there can be an option to turn off the study time on weekends.