Accuracy of altimeter across two F5 plus's

My wife and I both have a Fenix 5 Plus watch but for some reason my altimeter always reads higher from the same position.
Over the past two runs, both around 9 miles I've recorded 509ft compared to her 371ft and today 407ft to her 367ft.
Calibration on both watches is set to auto via GPS.

Is that an expected and acceptable difference? Are there any known issues with the accuracy of the altimeter?

0 Former Member over 6 years ago

Which watch appears to be correct? It's a long shot, but it's possible the watch that is off may have a little debris such as dust or mineral deposits from water in the port hole. Try placing that watch in a bowl of warm water with a drop of dishwashing soap and sloshing it around a bit. Rinse and allow to dry and see if that helps out. Another thing you can try is to manually calibrate both the altimeter and the barometer on both watches prior to running together and see if the differences remain. There should be that much of a discrepancy.