5 stars: I have been using the app for a couple of months how. Recently there was a big, starting from the 7h of June 2020. Could not track my sleep and other activities. Read the other feedbacks and realized that it was the app not working, not the wristband. Finally an update was released on the 12th of June, and it's BACK!. All working fine. Satisfied!
4 stars: Good thing happened to my life. I can monitor my body performance thru running , walking, hiking... it changed my life. But sometimes it freezes during my summer activities when my wrist gets too wet in the middle of the run/walk and loses all the acquired so far data . Its annoying. I did reset my watch and now it's doing good job without freezes. Hope it helped.
4 stars: After the latest update the app is virtually useless. Nothing has been done either, to revert to the earlier version, or to issue a new update to rectify the issues. * On 12th June an update was available, after this update, the app works correctly as it should. (One star changed to four stars)
5 stars: I love my Mi Band 4 and find the app very informative. It's not designed to be a medical device so I have never expected it to show 100% accuracy. However, it seems to be the most accurate of any band/app combination I have tried. The sleep score is always slightly out as it records meditation sessions as light sleep but this is not a major issue. Simple to use, accurate within reason and reliable. 5* app.
3 stars: 13th June pt2. Ok...