Sort of off-topic, but what fitness gadgets do you all like? I used a FitBit One for many years until I washed it recently and it died. Honestly, I never really looked at the data unless I expected it to be anomalous, even though I religiously carried it with me at all times. I bike 8-10 hours a week, so a few steps aren't really making a health difference for me. The big thing that annoyed me about FitBit is that Ap…
Battery is good, since the most recent update, previously it was terrible.
FitBit's sleep tracking is pretty accurate in my experience. It even gets my naps. It doesn't do REM vs non-REM, but it's good enough for duration tracking.
The sync functionality is abysmal though. Half the time it doesn't work or takes minutes which would be solved if they bothered to make a dedicated 'sync' function on the hardware. Instead you have to hope that the software and tracker coincidentally communicate (which also means that the tracker has to continually poll Bluetooth, wasting power).
The pedometer is very accurate, it gets each footfall most of the time.
But... it doesn't integrate with many apps which is annoying (e.g. Google Fit).
I mostly use it for the heart tracker, since that's pretty much the only useful metric for health that it can provide. The calorie count is very optimistic, for instance, but you can compare lazy vs active days.