THE BASICS: Track progress on favorite rides with data collected from a smartphone or other compatible fitness device. User-defined portions of rides, called segments, are ranked on a leaderboard, with KOM (king of the mountain) crowns and personal-best badges awarded for fast times.
COST: The app is free; $6 a month (or $60 a year) unlocks detailed heartrate and power analytics.
SOCIAL SKILLS: You can send friends Kudos and post rides to Facebook and Twitter. Then there's the frictionless humblebradding: emails notify friends and acquaintances when you've stolen their KOMs.
BEST FOR: Competing against friends. Turn an existing ride (or a portion of one) into a segment, then share the link so they can do it, too.