This app calculates your VO2 Max in just 3 minutes using a simple heart rate method. It's based on scientific research and provides general health information, not medical advice.






10+ similar apps compared and reviewed
PBOX is great, but it's not the only option. Explore 10+ similar apps for iPhone and iPad, each reviewed and rated by real users. Find free alternatives, premium upgrades, and hidden gems.










This app calculates your VO2 Max in just 3 minutes using a simple heart rate method. It's based on scientific research and provides general health information, not medical advice.


This app guides you through the 478 breathing technique to promote faster sleep, reduce stress, and calm your nervous system. It offers haptic guidance and heart-rate tracking on Apple Watch, with a clean, distraction-free design. Enjoy a privacy-first experience with no account required.






This app analyzes sweat data to provide personalized hydration and recovery strategies for athletes. It connects to a sweat sensor to track fluid and sodium loss, offering tailored plans and pre-session predictions to optimize performance.


Effortlessly create structured running and cycling workouts by simply typing them in plain English. This app converts your text descriptions into ready-to-use workouts for your Apple Watch or Garmin, with smart sharing features for friends.




Create and customize your own interval workouts with this intuitive timer app. Features include quick start templates, advanced customization, voice cues, and background operation. Seamlessly integrate with your music and save workouts to Apple Health.