Music on Vine - Vine, now with music. Make 6-second music videos.
Productivity Planner - This package contains a selection of 10 templates that have helped me increase my productivity over the past 5 years.
Mindie - 10 second music videos (w/ private mindies)
Habit List - Create good habits and break bad ones with the app that keeps you focused.
Triller - Make celebrity-quality videos with a few taps of your phone
QuietKit - Guided meditation for beginners (for free)