I'm trying to remember back to those dark, dark days... back in 2008 for example... before I had this marvellous little device in my pocket that could solve all of my problems. And if you think I'm exaggerating when I say "all", I will says that two years ago as I was hiking through the woods, I was being attacked by mosquitoes, but had forgotten to bring any bug spray. In desperation, I searched the app store for "Mosquitoes" and found apps that will emit sound frequencies in a range that drives Mosquitoes crazy, and they stay away!
So maybe it won't solve ALL my problems, but I'm barely kidding!
One of the peskier problems to bite humans is trying to change our habits. Below is a review of some apps designed to help. There are stills step around understanding our beliefs about things, and mental blocks, but these apps can be an important step in the whole process.
http://gadgets.ndtv.com/apps/features/this-app-helped-me-break-my-bad-habits-youll-totally-guess-what-happened-next-822365