Why the game stops working for some people
Gamified tracking works brilliantly for a while. The avatar, the party and the quests give a real reason to check in, and for people who are motivated by games that reason lasts.
For others the game slowly becomes a second job. You are not only keeping up with your habits, you are keeping up with a character's health, a party's quest and a set of rules about damage. When the point of the app was to reduce friction, that is friction.
Losing health for a missed day also has the same problem as a broken streak: the app responds to a normal human week by punishing you, at exactly the moment encouragement would help more.
