Hi guys.
Since I made the last post about this 250days have passed and the thread got locked.
Since then I received multiple replies, in this Forum, on Reddit and as PMs.
i would like to open a new thread where this issue can be openly discussed and other users with a similar problem can be helped. New reports also include the Android App.
There is an existing bug in the Fitbit App for iOS, where the heart rate is measured in the app, but it is not displayed in the history graphs. As far as I can tell, this bug exists since about 250 days and is independent on the version of iOS you're running. Android devices are not affected.
You will notice this bug if your "Heart" tab does not show any graph, or your "Workout" you recorded does not show any graph or the text 'no data'.
Example: https://ibb.co/r4Z0kBb
The fix to this is to switch your iPhone to 24h time. This is the process:
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Settings --> General --> Date & Time --> 24-H Time --> slide ON
Then restart the Fitbit app (closing it by swiping up), reopen the App and check whether the graph appears. This should instantly fix the issue.
Fixed: https://ibb.co/PYs2NWw
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There might be other functions which have been impacted by this, if so, let me know.
The bug is reproduceable across different Apple devices (iPad, iPhone) and across different models (Air, gen7, iPhone 13, iPhone 16). It always comes back down the 24h format.
There are other issues when you switch to 24h tho. A hart rate of 129 will in example be shown as 2h9min 2x60 + 9).
https://ibb.co/CpZgTbQb
Hope this solves some problems for some of you.
https://www.reddit.com/r/fitbit/s/vlbfQRKyPQ
