note: I have changed my rating to one star, because I am unable to find contact information on the developers website, which is not a good thing. I definitely would agree that this app does not function properly. when I tap on the stop button, The icon toggles to start, however the vibration does not cease. i'm not completely sure however that I would go as far as saying this app is garbage. it is unlikely, but it is possible that there really just is a serious bug. call me maybe a bit weird, but I'm willing to give the developer the benefit of a doubt. has anyone reached out to them to see if they are aware of these problems? i'm going to give the app a two star rating for now, as I don't feel it is fair to give it one star. We simply just do not know. if the developer winds up being unwilling to fix things, then I will change my rating, but for now, let's give them a chance.