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Mi band 6 sleep tracking result : r/miband
Xiaomi Mi Band 4 review: good hardware that's lost in translation - The Verge
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
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Xiaomi Mi Band 4 review - Wareable
Xiaomi Mi Band 4 review: A great cheap fitness tracker for under $100