Using FR265 with Verity Sense and Apple Watch Ultra. Connect both to the VS at the same time (works as VS has 2 Bluetooth channels).
Works perfectly when using “Treadmill” and “Strength” Profiles. Heart Rate on both AW and FR265 match perfectly. Maybe 1 second delay between the two when my HR changes. Even when HR changes fairly rapidly. The two match perfectly even for some long treadmill runs of over an hour.
Does not work smoothly when using the “Run” Profile. It seems to match at first for maybe 10-20 seconds, then the FR265 starts to drift by 2-5 beats for while, then it shows “—“ for a while, then it jumps back to match the AW. It then follows this cycle for the rest of my run.
FR265 firmware version : 18:22.
It is almost as if the watch is alternating between showing the heart rate from the VS, the internal heart rate sensor and no heart rate at all.
I also had a similar problem with the FR165 but much worse. The “drift” was by about 35 beats. Again, worked perfectly on “treadmill” and “Strength” Profiles, I gave up and returned the unit to the store yesterday. I bought the FR265 instead hoping that a model that has been on the market for longer would be more reliable.