ShazamBest for: Playlist JunkiesLove your instructor’s tunes? Shazam’s new auto-tracking feature identifies and tags every song played over the next hour, giving you one-touch access to your favorites on iTunes. (free) Charity MilesBest for: Do-Good AdventurersLog workouts and earn donations for organizations like Stand Up to Cancer: 25 cents for every mile you walk/run and 10 cents for every mile cycled. (free) MovesBest for: Data-Curious WalkersIt uses your phone’s motion processor to keep tabs on distance, steps, and calories burned. ($2.99) Yoga StudioBest for: Beginning PosersThirty ready-made routines based on ability, goal, and time. Newbies will love the instructional library. ($2.99) Hot5Best for: Core EnthusiastsFive moves, 5 minutes. Try one of the 75 quickie routines after a run, or stack a few for a full workout. (free) Flywheel SportsBest for: Class GoersLove your gym or spin studio, like Flywheel? Check to see if it has an app to easily book your favorite classes on the fly. More from Prevention: Tone Your Arms—In 10 Minutes