I have the S5 and suspected the HR readings no to be very accurate, as I was running my favourite tracks. So I made a reference run with my FR935 and chest belt. I did not trust my eyes what I have seen. And the device was tightly bound to the skin a properly positioned. I mean, we do not talk about “inaccurate” data, we talk about phantasy data.
OHR is not meant to replace the chest belt, but to provide at least meaningful HR readings, in particular for the 7x24h activity tracking. But sorry, these figures are far beyond any limits. And they want to derive some fitness and recovery data from that ?
S5
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FR 935
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