Habitica - Habitica is a free habit building and productivity application.
Loop Habit Tracker - Loop Habit Tracker (AKA uhabits) helps to create and maintain good habits in order to achieve their...
Purp - A smart to-do list and goal tracker app
Patterns App - Transform your routine with easy-to-log habits, from exercise to meditation, and night-friendly reminders.
Nirow - Habit tracking: Automated, Siri-ed, Calendar-ed, and More!
Everyday - Take a photo of yourself everyday.