Thanks a bunch for sharing Martin, very interesting!
Kudos for sharing btw. Very interesting to see your IOS results. Sorry that the IAP's didn't work.
The Compliment Habit (free on IOS)
The Gratitude Habit (free on IOS) - 500+ reviews, 5-Star average
Good Sex, Great Marriage (free on IOS)
The Secret of Success? - Fail; Improve; Repeat- 'till too good to ignore.