I've been a Fitbit user for the last 6 years, 5 devices....and the Charge 4 will probably be my LAST Fitbit. Dissapointingly laggy, auto-brighten doesn't work, wrist-movement detection sucks and Fitbit still have not fixed Android synching issues with Huawei devices - it's been 3 freaking years man, how much more time do u need? Time to give others a try.