Review on Amazfit Bip U Smart Watch Fitness Tracker with 60+ Sports Modes, 9-Day Battery Life, Blood Oxygen Monitor, and Water Resistance for Men and Women - Compatible with iPhone and Android Phones (Black) by James Hodzic

UPDATE: It worked fine for 3.5 months but not anymore. I've uninstalled/reinstalled the app a few times, updated the watch a few times Factory reset and they're all not working properly yet Sleep tracking is turned off A LOT, pedometer occasionally resets 5000(!) steps for no reason, it buzzes randomly even though all notifications are turned off, GPS is bound to the phone (which is fine except it ALWAYS loses connection, so mileage is really just a guess counts steps, O2 and heart rate accurately, their tracked workout stats are great, they can control music and notifications, their PAI is unique and quiet good (this is a Scientifically based indicator that compares energy expenditure with physical fitness and assigns a value to it arranges). And it looks nice too. This is a screaming deal! Absolutely fantastic watch.