Repetition is the mother of skill. If you want to get good at something, you just have to practice. It's that simple, but consistency is key.
The app is simple, you "check in" to an activity when you do it, and over time you can see how many days you hit and how many you missed. The idea is to get addicted to maintaining your streak. Having a visual representation of your consistent hard work is rewarding and reinforces good behavior.
Let's see how high I can get this streak!