This pedometer from Cleveland Clinic offers a smart blend of walking-related pedometer functions AND the ability to issue yourself "challenges." You can track the distances you walk against real world distances such as famous places (e.g., "Walk the length of the Grand Canyon") and/or between local Cleveland landmarks. You can also "theme" the application with skins related to Cleveland sports teams. These unique features make using the application fun and reward continued use. (And tell others you're a SuperFan!) People who love Cleveland and their sports teams will feel more connected and everyone may find their health improving with exercise! Works in the background (multitasking) of iPhone 4 phones, and a handy "screen lock" feature makes it work for iPhone 3G phones as well.