Modern parents know all too well the struggle of weaning their kids off of devices and digital games for even a moment, so the Marshmallow app uses the same addictive strategies employed in kids' games to reduce tech use altogether. The new parental controls system effectively gamifies time spent off of devices, giving kids rewards for hitting usage goals.
Like most other parental control apps, the Marshmallow app offers strong firewalls to block inappropriate content, and it can't be deleted without a parent's password. What sets the app apart is that is tracks children's use over time, and if those kids are able to limit their screen time to the goals set by parents (e.g. 'X' amount of screen hours per week,) they win points that can be converted into things like gift cards to spend in the Google Play Store.