BioBase - Measure and manage your stress
Habitica - Habitica is a free habit building and productivity application.
Headspace - Meditation made simple. Brilliant things happen in calm minds.
Loop Habit Tracker - Loop Habit Tracker (AKA uhabits) helps to create and maintain good habits in order to achieve their...
Time 2 - Stay focused and crush procrastination
Purp - A smart to-do list and goal tracker app