Free, but.... – Stridekick Review

Stridekick is okay for setting up challenges with friends. However, there's a large flaw that no one has bothered to fix. If you don't sync your steps within 24 hours, you have to contact customer support and have them do it for you. Seems like it ought to be an incredibly easy fix to give the user the option to sync for x # of days. Instead it's a lot of hassle.
Review by Martin Teller on Stridekick.