How does strava calculate speed?

Related questions

1. Does strava drain your battery?
2. Will strava give turn by turn directions?
3. Can you plan routes on Strava?
4. Does strava work without service?
5. What maps does strava?
6. Is there a free version of strava?
7. How accurate is strava GPS?
8. Can you find routes on Strava?
9. Can you edit a route on Strava?
10. Does strava work without cell service?

Tags

1. #distance
2. #contribute
3. #stream
4. #moving
5. #parses
6. #speed
7. #recorded
8. #uploaded
9. #calculate
10. #total
11. #additionally
12. #takes
13. #strava
14. #readings
15. #average
16. #calculated