Originally Posted by
Symtex
Any combination of multiple measurement will increase the accuracy. that being said, The Garmin computer unit are far more precise then a app based relying on phone GPS location. I know we all want super accurate data but when you are training whether you did 22 miles or 22.2 miles doesn't really matter in the whole scheme of things.
In my ridiculously low sample size, my phone works a ton better than the Garmin I was using. The Garmin was old, and I bought it used, and the phone is an iphone 6S. What you say may be true in general, but the phone can work quite well for some of us.