Forfeit is an app that can help you take more accountability for the things you need to do or should be doing. It helps people with low self-discipline (like myself) deal with it in a more extreme way. It has integration with RescueTime and I think it could make an integration with Exist.

No API, so now way to get your data out of Forfeit, and thus not possible. For an alternative that gives users control over their data, see Beeminder.