Sorry if this has been covered within other threads, but which of these is most accurate for a Garmin 255m in your opinion/s?
AP Pro, GPSTC Approved, Waterspeed or another?
Cheers.
apppro and GPSTC approved both give our divisions, I think waterspeed is more general.
Waterspeed has all the GPSTC divisions as well as quite a few more that are on GPSSS. Probably best to investigate further rather than making uniformed decisions based on what you think. Accuracy is based on the watches GPS capabilities rather than the app, all the apps use the same data from the watch. Even the data coming from the last few generations of Android phones has a high level of accuracy and gives error estimates.