Panmi - Stay on top of your sleeping patterns. Pair your Mi Band 4 with any Mi mobile phone to see detailed analysis and get a better rest. Available at https://bit.ly/30As5EM
So I just got the mi band 4 yesterday. And tried sleep analysis . I have those 3 apps (mi fit,notify,sleep as Android) and they all put out different data . So
How To Track All Day Sleep and Short Naps With Mi Band 4
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