Only for iPhone 5s
This is a great app, it does what it promises. I see some people complaining because this app is only for iPhone 5s but this is simply because it is the only iPhone that has the extra m7 processor so far (wich makes it possible to constantly track your steps). I hope this explains why the app is only for iPhone 5s.
i_l_y_a_ about
Steps – Step Counter, Activity