Strava - The #1 app for runners and cyclists
iFit – Workouts at Home - iFit – Workouts at Home app allows users to access an extensive collection of thousands of home workouts with advice and motivation from world-class fitness trainers.
BitGym - Virtual Cardio Tours. No heart rate sensor of special hardware required.
Treadmill Workout - Treadmill Workout is a health and fitness app through which you can do a treadmill interval workout based on high and low workout intensity.
fitbit - The Fitbit mobile app is for people who use Fitbit fitness trackers to keep track of their activity goals, food plans, and other fitness related things. Read more about fitbit.
FITIV Pulse - Taking heart rate data and fitness tracking to a new level.