Thank you, @silvertop . Actually my goal is always to be above 10 000 steps and I am quite sure I reach them every day. Somehow, I don't understand why, the app needs to be active in the background and if I close (kill) all sleeping applications in order to clean my memory, it stops. Which is not the case with my other active applications, which still work. From other side if I forget to start it in the morning it does not count my steps. But health is more important than the rewards earned :)