strava depends on gps, in mobile phones or other gps-enabled devices, to record supported activities which can be shared among user's followers or shared publicly. if an activity is publicly shared, strava automatically groups activities together, when they occur at the same time and place (for example, taking part in an organised marathon/sportive or group run/ride). each activity, depending on which activity selected, shows users' activity results, including route summary in map view form, elevation (net and unidirectional), speed (average, min/max), timing (total and moving time), power (with optional accessory) and heart rate (with optional accessory). each activity post has "kudos", enabling followers to like followed activity and leave comments.