The reminders are helpful, and the app is easy to use, especially when tracking more than one habit. My only quibble is that when i changed phones, it didn't port my records over like the instructions said they would. But I did at least download the records ahead of time. EDIT: I returned to this app after a hiatus, and not only had it deleted my data, it also essentially deleted me! I can't log in, and when I try to register, it says my email address is already taken.