I bought a WS-50 in March 2015.
The weight is very accurate. dcrainmaker found it agreed within 0.2% (ex - 198 not 198.4) with a BodPod setup. It's consistent in the same location, where I suspect that comes from my uneven bathroom floor with one foot completely unloaded when it calibrates itself. I line it up with the same points on the linoleum pattern so it behaves.
The body fat measurement can be fiction although dcrainmaker's tests only found median deviations of 3.3% and 4.4% in athlete and normal mode versus a BodPod, which determines density using air displacement plethysmography providing +/- 2.5% accuracy. For one user in his tests it read 12.8% and 7.1% low respectively (as in the difference in percentage, under-reporting fat mass by up to 61%). Another measured 3.5% and 5.6% high respectively where 43% excess fat mass is a big deal for an athlete targeting minimum safe weight.
Mine reports 3-4% in athlete mode which is impossibly low, although it's consistent at similar hydration levels when I weigh in after having my morning beverage and relieving myself. When I ignore the manual telling me not to and check on waking it can vary by a full percent which is 25%. I've been meaning to see where I'm at via DEXA or BodPod but haven't got around to it.
Sometimes the heart rate doesn't register at all, it's inconsistent, and I wouldn't count on it for standing resting pulse.
I get a spontaneous switch from pounds to kg almost every time I take a hot bath.
Beyond accuracy weighing, the big thing with WiThings is the best software ecosystem with support from programs like Golden Cheetah. It does a great job uploading data to the web site.
The weight is very accurate. dcrainmaker found it agreed within 0.2% (ex - 198 not 198.4) with a BodPod setup. It's consistent in the same location, where I suspect that comes from my uneven bathroom floor with one foot completely unloaded when it calibrates itself. I line it up with the same points on the linoleum pattern so it behaves.
The body fat measurement can be fiction although dcrainmaker's tests only found median deviations of 3.3% and 4.4% in athlete and normal mode versus a BodPod, which determines density using air displacement plethysmography providing +/- 2.5% accuracy. For one user in his tests it read 12.8% and 7.1% low respectively (as in the difference in percentage, under-reporting fat mass by up to 61%). Another measured 3.5% and 5.6% high respectively where 43% excess fat mass is a big deal for an athlete targeting minimum safe weight.
Mine reports 3-4% in athlete mode which is impossibly low, although it's consistent at similar hydration levels when I weigh in after having my morning beverage and relieving myself. When I ignore the manual telling me not to and check on waking it can vary by a full percent which is 25%. I've been meaning to see where I'm at via DEXA or BodPod but haven't got around to it.
Sometimes the heart rate doesn't register at all, it's inconsistent, and I wouldn't count on it for standing resting pulse.
I get a spontaneous switch from pounds to kg almost every time I take a hot bath.
Beyond accuracy weighing, the big thing with WiThings is the best software ecosystem with support from programs like Golden Cheetah. It does a great job uploading data to the web site.
Last edited by:
Drew Eckhardt: May 22, 15 6:14