Recs.
Updated
SpecsUpdate
Pros
Pro Gamifies the process to motivate
The app takes cues from role playing games by having a system that rewards certain behavior with experience points, levels, and gear upgrades. It also allows you to set custom rewards that you come up with yourself such as watching an episode of your favorite TV show.
Pro Can use peer pressure to motivate
The app allows creating a party with other people and go on a quest together. Here, your actions affect not just you, but everyone else in the party as well. If you fail a task, the party loses health, if you complete a task, the party gains experience, etc.
Cons
Con Almost no way to organize tasks
You can separate tasks into habits (can give or take away points), dailies (tasks you should complete every day), and to-dos. That is the extent of the organizational features it offers you, there is no other way to organize tasks.