The device itself works fine but the app is woeful; repeatedly failing to correctly record daily step count (even when it has the right data but for some reason doesn’t aggregate it correctly). The help desk response has not been particularly helpful, either; and as the app is such an important component of the overall ownership experience, I’m forced to give it only two stars. Sorry Gard Pro but you know exactly what you need to do, to sort it out - fix the app, for five stars!!