Why Motiv data can be different from that of another tracker you’re using
Motiv tests accuracy against foot pods which are the best source of “truth” for steps, and compares performance to popular wrist-based trackers. Additionally, Motiv counts fairly sustained steps and not every random step — that’s our intention in depending on the Active Minutes metric as opposed to a 10k benchmark. Making sure you’re being properly “rewarded” for sustained physical activity rather than a blanket number of steps taken. Many trackers (and wrist-based devices) are reported to overestimate steps - which is why we aim to meet the accuracy of foot pods. (Murmurings of that indicated here, here + here.)
Why does my Heart Rate data differ between Motiv Ring and (Polar, Apple Watch 3, etc)?
Motiv will only report average measurements per minute, so if the max HR is not sustained over a span of a minute or so, the minute average for that time will be lower than what other trackers can report, as they can report HR with higher temporal resolution.
There is a trade-off between higher temporal resolution and battery life. So if we were to report HR more frequently, our battery life would drop, and we decided that battery life is more important for your ring, as it is a 24/7 monitor, and not fitness-training focused.
Wrist-worn devices often have a much stronger optical signal to work with, and have a lot less ambient interference because the optical sensor is more protected under a larger area. So our algorithms have to be even more robust than what is run on wrist-worn trackers. Given the constraints of available chips for our form factor, our limited real-estate, and our desired battery life, that is a serious challenge.
More background data here.
We will continue to work on making Motiv Ring better and will be releasing improvements to users through firmware and app updates.