This app has greatly helped me in creating better study habits and eliminating procrastination (I'm a high school senior for reference). Part of the reason is because, rather than simply completely blocking usage of apps, it allows you to choose to break your streak, forcing you to actually consider the consequences of procrastinating. My only gripe is that I feel like the ability to whitelist apps should be free (although it is only around $3, which isn't bad). I'd recommend it to anyone.