“Watch your thoughts, they become words. Watch your words, they become actions. Watch your actions, they become habits. Watch your habits, they become your character. Watch your character, it becomes your destiny.” ~ Talmud
This app guarantees feelings of success – every day. Therefore it improves your self-awareness, contentedness, pride and self-confidence tremendously.
The success of this concept lies in its usage and derives from its humble requirement of will-power and time. The foundation for this is in small habits that can be done easily on a daily basis.
For instance, to do a push-up you do not need a large portion of will power or time. Beyond that, the probability of overdoing the goal is large (i.e. you can do more, but always fulfill the minimum goal!)
This is different if you want to exercise 3 times per week for 60 minutes. Hence negative feelings that are usually associated with not achieving ones goal are prevented.