Samsung Health

Together step challenges Owners of a Samsung Galaxy phone may already have a good step challenge app. The Together tab in Samsung Health offers two simple formats: Get there first, a race to a step target, and Go the farthest, the most steps in a set time, either as individuals or in teams. You can invite friends directly or send a link, and set who sees your step count and who may challenge you. The catch is the phone. Together is built around Galaxy phones, and Samsung's own help pages disagree about whether it works in the iPhone version of Samsung Health, so a group with iPhone users is better served by StepUp or Pacer.