Originally Posted by
FPSDavid
The Garmin SHOULD be more accurate, as it uses its barometric altimeter and your phone just "guesses" based on GPS.
For those who may not know, Strava gives you an opportunity correct your elevation gains using map-based information, just like Garmin Connect and other sites designed to work in tandem with GPS-enabled cycling computers do. Technically, that should be more correct, I suppose, assuming that their map data is good.