# Aerobic Threshold Calculator — Find your aerobic heart rate

> Calculate Aerobic Threshold heart rate using heart rate drift test and Apple HealthKit. (iPhone/iPad app by Benjamin Pearman.)

- Source: https://appshunter.io/ios/app/aerobic-threshold-calculator/id1626872415 (this page in markdown: same URL + `.md`)
- Developer: [Benjamin Pearman](https://appshunter.io/developer/1626872417)
- Category: Health & Fitness, Sports
- Price: Free
- Rating: 5.00/5 from 1 App Store ratings · 2 written reviews indexed
- Age rating: 4+
- Requires: iOS 15.3 · 0 MB
- Languages: English
- Released: 2022-06-03
- Data updated: 2026-07-05
- Monetization: free
- User reviews in markdown: https://appshunter.io/ios/app/aerobic-threshold-calculator/id1626872415/reviews.md

## What is Aerobic Threshold Calculator?

Find your Aerobic Threshold heart rate to improve your endurance. Countless studies have shown that the best way to increase your endurance is by training at or below your Aerobic Threshold (AeT). Unfortunately, for a long time the only way to find your AET was an expensive lab test using gas exchange. Recently however, studies have shown that the heart rate drift test can be almost as accurate as a gas exchange test. 
The AeT calculator app integrates with Apple Healthkit to allow users to calculate their HR drift without having to export files and upload them to third parties. 

How the test works:
1. Estimate your Aerobic Threshold HR.
   a) This should be a very easy pace, you’ll probably be able to maintain conversation in complete, medium-long sentences.
 
2. Go for an outdoor run on the flattest terrain you have access to. Record your run using your preferred training watch / chest strap. 
      i) Your device needs to be able to record your heart rate and running pace (GPS enabled). 
      ii) Your device needs to be able to sync with the apple workout app. If it doesn’t pair with your iPhone, you should be able to import through Strava.                                                                         
   a) Your run should be 1 hour long.  
   b) You should warm up for 15 minutes, slowly increasing your heart rate to your estimated Aerobic Threshold. 
   c) Maintain your estimated Aerobic HR as closely as you can for the hour, adjusting your pace accordingly. 

3. Open your run in the Apple workout app.
Note the start time and end time. 

4. Return to the AET calculator and select the start and end times of your run. 
    a) If you recorded your warmup and cool down, subtract those times from the run. 
         i) Example: You start your run at 5:00pm, warmup for 15 minutes, run for an hour, then cooldown for 15 minutes. Your whole workout lasted from 5:00pm - 6:30pm, but you would input 5:15pm - 6:15pm.

5. Press “Query Workout Data” 
    a) Stats about your run will populate the fields, make sure it looks correct. 
6. Press “Calculate HR Drift” 
    a) Your HR drift will be displayed. 

6. If your HR drift is between 4.5% - 5.0%, you have successfully found your aerobic heart rate.
    a) If it’s under 5%, your heart rate was below your aerobic threshold (running too slow). 
    b) If it’s over 5%, your heart rate was above your aerobic threshold (running too fast).

You may have to perform the test a few times to get a value of 5.0%

## Key features

- Calculate Aerobic Threshold heart rate
- Integrates with Apple HealthKit
- Heart rate drift test guidance
- Customizable run duration input
- HR drift percentage display

## Recent user reviews (2 of 2)

All indexed reviews: https://appshunter.io/ios/app/aerobic-threshold-calculator/id1626872415/reviews.md

### 5/5 — Easy way to do the HR drift test!

*2022-09-27, version 1.01*

Simple and convenient. Uses the methodology that I read about in “training for the uphill athlete”. Nice to be able to calculate this periodically.

### 5/5 — Aerobic Threshold Calculator

*2022-08-21, version 1.01*

The Ap is super helpful. Has helped my training program and improved my running endurance.

## Frequently asked questions about Aerobic Threshold Calculator

### How does Aerobic Threshold Calculator help improve endurance?

It helps you find your Aerobic Threshold (AeT) heart rate. Training at or below this rate is scientifically proven to be the most effective way to increase your endurance.

### What is the heart rate drift test used by Aerobic Threshold Calculator?

The heart rate drift test is a method to estimate your AeT without expensive lab equipment. It measures how your heart rate changes during a steady-state run, providing an accuracy comparable to lab tests.

### Does Aerobic Threshold Calculator require a special device?

Yes, you need a device that can record your heart rate and running pace (GPS enabled) and sync with the Apple Workout app. If it doesn't pair directly, syncing through Strava may also work.

### How accurate is the Aerobic Threshold Calculator?

The app aims for accuracy by using the heart rate drift test, which studies show is nearly as accurate as gas exchange tests. A successful test results in an HR drift between 4.5% - 5.0%.

### Can I use Aerobic Threshold Calculator without Apple HealthKit?

No, the app specifically integrates with Apple HealthKit to allow users to calculate their HR drift without manual file exports. This integration simplifies the data retrieval process.

### What is the recommended run duration for the test?

The recommended run duration for the heart rate drift test is 1 hour. This includes a 15-minute warm-up and a 1-hour period maintaining your estimated Aerobic Threshold heart rate.

### What does it mean if my HR drift is under or over 5%?

If your HR drift is under 5%, it suggests your heart rate was below your aerobic threshold during the run, meaning you were running too slow. If it's over 5%, your heart rate was above your aerobic threshold, indicating you were running too fast.

### Is Aerobic Threshold Calculator available on Android?

Based on the provided data, Aerobic Threshold Calculator is designed for Apple devices, specifically supporting iPhone and iPod. There is no information indicating Android compatibility.

## Version history (last 1 release)

### 1.01 — 2022-06-03

No release notes.

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All apps by Benjamin Pearman: https://appshunter.io/developer/1626872417

## Related topics

[aerobic threshold calculator](https://appshunter.io/ios/topics/aerobic-threshold-calculator)

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*Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-07-05.*