I think another lesson here is that the app was built to help people do something hard (build/change habits) and all the apps that are wildly successful are mor

I think another lesson here is that the app was built to help people do something hard (build/change habits) and all the apps that are wildly successful are more oriented to reforcing easy, lazy, and bad behaviors (gossip, idle chatter, time-wasting, procrastination). The people who really make up their minds to change habits don't need an app. They just do it.