Per a previous post, a bunch of us expressed an interest in a step/activity group, especially for the challenge. I know some people use fitbit, apple, android, or other devices, so the app Activity.Club allows us to all join together on one interface. You can do daily, weekly, and other types of challenges.

Download the Activity.Club app from the app store or play store (logo is three sick figures running in white, pale orange, and dark orange) and once you set up your profile, look for the group StepTalk. You can sync it with apple health, android fitbit, jawbone, etc. easily right from the app. Mine synced to AppleHealth right away with no problem.

Join me Once we have some members in the group I can set up a step challenge

***EDIT*** It appears the group doesn't show up in the search. Add me as a friend (cthorpe) and I will add you to the group