jimkolowski
u/jimkolowski
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I've found the D2 reasonably accurate as long as you do the basic stuff required for a BP reading (sitting still with the back supported, raising your arm so it's ~ heart level, etc.) There's also a new one with the review out today: https://the5krunner.com/2026/04/08/wellue-bpw1-review-smart-blood-pressure-monitor/
Sure, these are not 100% accurate.
But many people are interested in *trends* rather than the actual number, and it works decently well for that.
I’ve been tracking this very closely across Whoop and Garmin, digging deep into the numbers over longer periods of time, cross-checking it with body weight etc.
Whoop is reasonably accurate IF:
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you do a lot of cardio
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over longer time horizons
Whoop undercounts calorie burn when resting or lifting (HR). It overcounts cardio burn. Garmin the exact opposite.
The yearly average is pretty close across the two platforms, though, depending on your training style.
If you primarily lift, add 10-20% to your Whoop average and you are close enough.
Also important that Whoop and Garmin are the two most accurate (least inaccurate) platforms for calorie burn. Everything else I tested (Apple, Oura, Ultrahuman) is basically a dumpster fire.
