Real-time Heart Rate

Track your heart rate in real-time through Apple Watch, ensuring your workout intensity stays in the optimal zone

SubMax HIIT

Science-based submaximal HIIT method that delivers optimal training effects while reducing injury risks

Personalized Training

Automatically adjusts work and rest intervals based on your heart rate data and training goals for a truly personalized HIIT experience

Apple Health Integration

Seamlessly integrates with Apple Health, automatically syncing all workout data to help you track your fitness progress

The Science Behind SubMax HIIT

Traditional HIIT often pushes you to your absolute limits, which can lead to burnout and increased injury risk. Our SubMax HIIT approach, based on scientific research, keeps your intensity in the optimal zone - high enough to drive improvements, but controlled enough to be sustainable.

This smarter approach allows for more frequent training sessions while reducing recovery time, leading to better long-term results. By maintaining your heart rate in the optimal training zone, you'll achieve:

  • Better fat burning efficiency
  • Improved cardiovascular endurance
  • Reduced risk of overtraining
  • More consistent progress over time

Get the app now!

Download on the App Store
Version 3.08 - Released December 30, 2024