I use Locus Map pro for my gps with my Galaxy smartphone. The data given and recorded is more diverse than strava. Plus it can be used for turn by turn if I upload a .gpx course into the app. Either way, when I am done and I save my recorded ride, it auto uploads to Strava. I have Locus Pro set to use my phones baro sensor for the most accurate elevation readings and yet every time it uploads to Strava, Strava recalculates and my elevation is ALWAYS lower than it is on Locus. I am not sure which to believe. For a ride the other day, I set both apps to record so I could compare the results side by side before any uploads. Locus said I had an average speed of 13.2 and Strava said my average speed was 13.7. Locus said my elevation gain was 843 feet and Strava said it was 591 feet. Go figure.