[kdmtctl]

Data aside, neither are ideal. I can’t sleep with the Apple Watch because it needs to be charged while I sleep to get through the day, and the Fenix is too heavy for my wrist at night. I use an old Mi Band, which tracks approximate data that suits me.

[alternatex]

According to reviewers, Mi Bands and generally all of Xiaomi's devices are fairly bad at sleep tracking. So much so that it's almost pointless to use them for that.

[user_7832]

I know it’s fully anecdotal, but my Xiaomi/Huami (former Xiaomi sub-brand) devices have matched up sleep duration quite well with what I feel in the morning - and I’m quite sensitive to less sleep. I think it’s quite good for sleep duration, but I don’t rely on REM duration etc as I don’t have much use for it. When it predicts a good sleep score I’ve definitely slept well, though sometimes it gives a lesser score even when I don’t appear to have slept poorly.

(I’ve used a Mi Band 1, an Amazfit Bip, and currently an Amazfit Band 7.)

[kdmtctl]

Could be true. But I have no use for more precise and deeper info. I need it only to fight possible anxiety spikes and attribute them to a bad sleep.

[aeontech]

FWIW, I charge my watch while taking a shower before bed and in the morning, and that seems to be enough to get me through the day and through the night.