I've had a Mi Band 1 & 2. I'm looking at buying a 4. The sleep tracking was pretty poor in the 1 & 2(did't record when you wake up in the night, didn't track day naps etc). Just wondering if anyone has the 4 and if the sleep tracking is any better as we've got a newborn, so we're up and down constantly and would like to get some idea of total actual sleep.
I have the 4 and I'd say not much has improved there, doesn't really know when I'm awake at all. Also counts lots of extra steps when on train, in car etc. Otherwise love the 4 but it does have some inaccuracies.