- The heartrate reader is only accurate when you're at rest. Any sort of sweat or physical activity and the reading becomes wildly inaccurate or just stops working.
- The app takes like 5-10 minutes to sync every time and it won't sync in the background. So when syncing, I have to move my finger around on the phone so my phone doesn't lock and mess up the sync. I live in China so that might be the issue here. YMMV
- It does auto detect but I have a Vespa scooter so everytime I ride my scooter, it counts it as me walking a shitton of steps and I have to manually go on the website to delete those activities. This is also occasionally an issue in cars.
Overall, just dissatisfied with how this product works.
I'm OK with the HR accuracy, but the sync issues make it more trouble than it's worth. I still wear the thing, but only bother to sync and look at the app perhaps once a week at most since it's so damn slow.
Mine has an air bubble in it (which is common, just do a search) while many others have also reported that their charge band is peeling.