Habitica - Habitica is a free habit building and productivity application.
YourHour - YourHour is an app by Mindefy labs through which you can easily overcome with your phone addiction by monitoring your phone usage.
Loop Habit Tracker - Loop Habit Tracker (AKA uhabits) helps to create and maintain good habits in order to achieve their...
21 Days - 21 Days app enables the user to track their habits to take challenges to adopt good habits.
ActivityWatch - Log what you do on your computer. Simple (yet powerful), extensible, no third parties.
iBetter - iBetter app comes up with features to help you in fighting bad habits and developing new habits through your smartphones.