Rocketbody lite is a split-second ECG analysis and determination of the optimal time for trainings. • Use Apple Watch 4 to analyze your health at the given moment. • Import data into the app. • Learn the body's readiness for training to make it more effective. Free and simple app for everyone who does sport. RocketBody pulls your health data (e.g. workouts, HR/HRV) from HealthKit to show how your metabolisms reacts on your activities.