Heart rate wildly inaccurate on Apple Watch Ultra

If I open the Health App/Browse/ Heart -> Resting Heart rate, then choose the daily view, my heart rate show as "Average" and if I move the screen to the left, I can see the heart rate at certain times of the day.

Same for the Weekly View, for example. It shows the average for the last 6 days and if I tap on one of the points in the graph, it shows the average reseting heart rate for that date.

If I select "Heart Rate" instead, I'm seeing the range of my heart rate during the day, as shown in this photo:

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copied from this article: Monitor your heart rate with Apple Watch - Apple Support

Apple Watch Ultra 2, watchOS 10.6

Same thing is happening to me. To the point now where I’m getting fed up with Apple. Used to also

happen on my series 3 Apple Watch. Now it happens on my ultra.

I was running yesterday and yes I was working. But I was not at 188 or 190 BPM as the watch was saying.

Has anyone has any joy with Apple? I’m tempted to request money back and switch watch makes.

Same issue here, but on a stationary bike. Within seconds of starting, it said my HR was 180. It stayed at that levels for about 30 minutes, although at one point the watch asked if I was done with my workout. After about 40 minutes, it fell to the 110-125 range, which was probably accurate.

The heart rate tracker on my ultra 2 watch is inconsistent. It starts off at a ridiculous high inaccurate rate or doesn’t record at all. It’s expensive. I purchased it for working out and tracking my heart rate.

I'm experiencing the same issue to the point where I don't believe that these monitors are actually reliable and merely a "reference". I have both Ultra 2 and Samsung Watch 6 which I wear at the same time (AW on left Samsung on the right). I track all of my workouts with both watches at the same time and the results are very different.

AW usually reads a much lower heart rate, while Samsung reads up to 20 points higher and several times. My workouts are all out, and I feel that Samsung is where I should be. For example, I jump rope with a heavy rope and go fast. Samsung reads 160 bpm, but AW would read 135. However, I feel more about the 160 than the 135.

Even sleep tracking varies a lot. Both would detect the same amount of sleep, but the breakdown between heart rate, deep, rem, and core sleep would vary. AW would read a lot lower in deep sleep, whereas Samsung would double.

Overall, I am unsure which one to believe and just figured you would need both and find the middle to get an actual result, but who wants to keep having both? I keep reading that AW is more accurate, but after wearing both for a year, I am unsure if that is true. My heart rate for my feelings about Samsung seems more precise, but the feeling is subjective.

Not sure if left and right arm make a difference even though it's calibrate accordingly and conditions are the same for both beside the location being right and left arm

Over the last few weeks my Ultra has given me several warnings about low heart rat i.e. below 40bpm which is what I had set it at, the periods all seem to be for a very neat 10 minutes which I find suspicious. Does anyone else have this experience, today I got the warning and did a check the bpm waved from 80 to 40 makes it difficult what to believe.

i think the problem is you spent over 1000$ on a whatch

I have had my Ultra 2 Watch since Dec 2023

and it continually reads “too high of a heart rate”

how do I correct?

Apple Watch heart rate wildly inaccurate

I was really hoping there was a good solution! I have an Ultra 2 and am experiencing the same issue. Now I cheat my watch by forcing a heart rate reading and then it finally shows the correct reading. I'm wondering if it is picking up our running cadence rather than heart rate? I changed to the Ultra 2 from my Garmin because I could never get an accurate heart rate with it so I had to use a chest or upper arm strap.

Gary, I'm sorry to hear that you're experiencing this issue on your Apple Watch Ultra.

The best next step would be to contact Apple Support or book an appointment at your local Apple Store/Apple Authorized Repair Provider: Apple Watch - Official Apple Support

Best of luck!

-Dallen