StepUp Pedometer Step Counter

The easiest way to run a step challenge for a club, an office or the family. StepUp is free with no subscription and no features held back behind a paywall, and a private group can be as small as a few friends or as large as 15,000 people. Groups get daily, weekly and monthly leaderboards that update by themselves, and by default nobody but you can see your steps. It suits a mixed group because it works on any iPhone or Android phone carried in a pocket, while anyone with an Apple Watch or Fitbit can sync through Apple Health or Android Health Connect. Nobody has to buy a gadget to join in.