I would give it 5 stars but while I was setting it up it wanted to update the software and it ran out and stuck with me. After a frustrating couple of days I wanted to bring it back to Revain. Eventually he started to work. I mainly use this watch to monitor my son's blood glucose levels as he is type 1 and immediately felt part of my problem for trying to use the app for his readings. I'm not 100% sure that was the case, but I have a feeling it was part of the problem. I'm disappointed it doesn't vibrate when I want it, but I've learned to accept it. Also, googleOS does not have the ability to display health data on the phone. For example heart rate and steps for a week or a month. It's all on the clock. I like the dates, maybe I'm looking at them in the wrong place. The battery lasts all day if you turn off the heart monitor, dim the screen, don't leave the screen on all the time, and only allow "essential" notification apps. Overall I give this watch five - it works well for what I need it for. π
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