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SocialBoat.live - A real life Fitness game
Intervally - Interval Timer - Sport & Health
Kickoff (formerly Kudos) - A certified personal trainer via app & text for $3 a day
HIIT Interval Buddy - Let Interval Buddy help you with your high intensity interval training - a popular method of high-impact cardio fitness training that reduces time spent in the gym and makes cardio training less of a bore.
Moov - Meet your personal coach
HIIT (Watch) - A very simple interval timer engineered for Apple Watch