Fitness Age

Fitness Age

Cardio Fitness Tracker

13 ratings
4 reviews
Free
In-App Purchases

Details

  • Released
  • Updated

Features

Fitness Age screenshot #1 for iPhone
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Fitness Age screenshot #8 for iPhone
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About

Easily track your cardio fitness and understand your health. This app calculates your fitness age, relative age, and percentile using your cardio fitness scores. Monitor your progress with interactive graphs and customize your Apple Watch complications.

Works with Apple Health
Calculates Fitness Age, Relative Age, and Percentile
Interactive History graphs
Apple Watch app and complications
Multiple conversion algorithms
Improved UI/UX design
Add samples from within the app
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What's New in Fitness Age

2.2

April 7, 2026

2.2: - NEW: The percentile graph now also shows how man standard deviations your fitness is from the mean - NEW: Easy sharing to make it simpler for you to keep your friends and family up to date - NEW: You can now see the algorithm in the app for the first time — and even create your own for a more customised experience. - Improved graph to always show your latest sample without averaging - Graph settings now persist across launches so you can keep the settings exactly how you prefer them 2.1: - NEW: iPad support. View your health data on the big beautiful screen of iPad. 2.0: - NEW: Improved UI and UX design. The app is easier to use than ever before. - NEW: Data screen allows you to see the raw numbers in a convenient way - NEW: Ability to add samples from within the app. Saves directly to Apple Health. - NEW: Ability to customise the history graph. Now you can show/hide elements to your exact preferences. - Performance improvements across the board. - Various fixes and stability improvements

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In-App Purchases

$8.99

Unlock All Features

Unlocks all features in the Fitness Age app.

User reviews

Brilliant

I am so young now! Love it. 🥰No idea if it is accurate.

Thanks!!

Really appreciate the accuracy and simple user interface. Thanks thanks thanks!!!

Syncs great with Apple Watch and I’ll be getting an auro ring as well soon so I’m excited.

yay

works so easily with apple watch data, thanks!!

Waiting for data

Life king Garmin user. So I don’t have enough data for the cardio fitness to track. So we’ll see once it’s got enough data

FAQ

What is Fitness Age?

Fitness Age calculates your fitness age by comparing your cardio fitness scores to population averages. As you age, your cardio fitness is expected to decline, causing your fitness age to rise. Frequent exercise can help lower your fitness age.

How does Fitness Age calculate Relative Age?

Relative Age is calculated as the difference between your fitness age and your actual age. It is age-adjusted to remain stable over time and serves as a good indicator of changing fitness levels over long periods.

What is the Percentile feature in Fitness Age?

The Percentile feature in Fitness Age compares your fitness level to the fitness ranges of people your age. It provides a good indicator of how you measure up against others in your age group.

Does Fitness Age work with Apple Watch?

Yes, Fitness Age offers an Apple Watch app for quick updates and customizable complications on your watch face, allowing for easy access to your fitness data.

What data does Fitness Age need to function?

Fitness Age requires access to your 'Cardio Fitness' level (VO₂ max) from Apple Health. Your age and sex are also needed to calculate your relative age and percentile.

How often is Fitness Age updated?

The latest version of Fitness Age is 2.1, and it was last updated on July 30, 2025, indicating active development and regular improvements.

What are the conversion algorithms used in Fitness Age?

Fitness Age utilizes multiple conversion algorithms based on the FRIEND fitness data (Fitness Registry and the Importance of Exercise: A National Data Base) to provide comprehensive fitness calculations.

Is Fitness Age suitable for all ages?

Fitness Age is rated for ages 4 and up, making it accessible for a wide range of users interested in tracking their cardio fitness.