Beeminder!

Keep track of your Beeminder goals, add data, and get push notifications before derailing with the Beeminder iPhone app. Beeminder is goal-tracking with teeth. We plot your progress on a yellow brick road to your goal and if you go off track we take your money The Beeminder app also allows you to sync goals with your Apple Health data, so you can automatically track steps, distance, and other metrics without manually entering data.

* http://techcrunch.com/2013/01/02/best-health-apps
Beeminder named one of the hottest health and fitness apps of the year * http://www.forbes.com/sites/tjmccue/2013/01/07/11-stellar-tools-to-keep-new-years-resolutions
' Beeminder is ] serious about helping you succeed. But they are playing for keeps.' * http://blog.beeminder.com/southwest
Full page feature (not an ad, mind you in Southwest Airlines' in-flight magazine: 'This new online tool forces you to shap up — or pay up' “It's an amazing piece of software. You guys really have impressive design abilities to take such a difficult concept and pull it off as a practical app. It's really a great feat in out-of-the-box thinking. Kudos!” -- Conrad Barski, M.D. http://lisperati.com,
author of Land of Lisp