[pmuk]

I have just started using an Apple Watch Ultra for running and it does seem more accurate to me. My old Series 6 would underreport distance, e.g. a 5k park run would be measured as 4.9km. I also noticed with the Series 6 that if I did a u-turn that my pace would drop considerably as the watch was presumably missing some of the distance I had travelled whereas the Ultra seems much better in this regard.