# VO2 Max Tracker vs Intervals

The clearest difference is iOS requirement: VO2 Max Tracker at 16.6 against Intervals's 18. On price, rating, ratings volume and update cadence there is nothing between them.

Both are free to download. VO2 Max Tracker sells 6 in-app purchases, starting at $4.99 per 7 days and Intervals sells 2 in-app purchases, starting at $2.99 per month. Whichever you choose, the download price is not the number that matters.

On the App Store both sit at effectively the same score — 4.0 for VO2 Max Tracker against 4.0 for Intervals. Both are backed by a comparable volume of ratings — 1 and 1 respectively.

VO2 Max Tracker ships an update weekly, Intervals every 9 days. The most recent releases landed on September 26, 2026 and September 24, 2026 respectively.

## The numbers

| Metric | VO2 Max Tracker | Intervals |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [4.0 (1 ratings)](https://appshunter.io/ios/app/vo2-max-tracker-zephyrus/id6450862734/reviews) | [4.0 (1 ratings)](https://appshunter.io/ios/app/intervals-the-training-timer/id6736897379/reviews) |
| Number of ratings | 1 | 1 |
| Positive reviews | — | 100.0% of reviews |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | **Weekly** | Every 9 days |
| Monetization | Freemium | Freemium |
| Size | 14 MB | 49 MB |
| Requires iOS | **16.6** | 18 |
| Devices | **iPhone, iPad, Apple Watch** | iPhone, Apple Watch |
| Age rating | 4+ | 4+ |
| Developer | [Havard Tryman](https://appshunter.io/developer/1662964293) | [Christoph Gogolin](https://appshunter.io/developer/511901280) |

## What reviewers say

### VO2 Max Tracker

[App page](https://appshunter.io/ios/app/vo2-max-tracker-zephyrus/id6450862734)

Measure your cardio fitness (VO₂ max) using a treadmill test and track your progress. Create or select from pre-made HIIT workouts, with real-time guidance on target zones. Integrates with Apple Watch and Bluetooth heart rate monitors.

**Highlights:** VO₂ max testing on treadmills, HIIT workout creation and selection, Real-time target zone guidance, Apple Watch and heart rate monitor integration, Workout history with heart rate graphs, iCloud data synchronization

**Features:** Apple Watch app, Vision Pro support

**In-app purchases (6)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Pro (Weekly) | $4.99 | per 7 days |
| Pro (Monthly) | $7.99 | per month |
| Pro | $8.99 | per 7 days |
| Pro | $24.99 | per year |
| Pro (Yearly) | $24.99 | per year |
| Pro (Yearly) | $59.99 | per year |


### Intervals

[App page](https://appshunter.io/ios/app/intervals-the-training-timer/id6736897379)

This app provides a versatile interval timer for various training styles like HIIT and Tabata, integrating seamlessly with Apple Watch and iPhone. It offers detailed workout tracking, custom workout creation, and performance analytics to help users achieve their fitness goals.

**Highlights:** Real-time workout tracking on Apple Watch, Customizable workout editor, Training Impulse and heart rate zone analysis, Game Center integration for leaderboards, Weekly progress challenges, Apple Health integration

**Features:** Apple Watch app

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| All Pro features (monthly) | $2.99 | per month |
| All Pro features (yearly) | $12.99 | per year |


## Frequently asked questions

### Is VO2 Max Tracker free?

VO2 Max Tracker is free to download, with in-app purchases available.

### Is Intervals free?

Intervals is free to download, with in-app purchases available.

### Which has better reviews, VO2 Max Tracker or Intervals?

VO2 Max Tracker and Intervals are both rated 4.0 out of 5 on the App Store, from 1 and 1 ratings respectively.

### Do VO2 Max Tracker or Intervals have ads?

Neither VO2 Max Tracker nor Intervals shows ads.

### Which is updated more often, VO2 Max Tracker or Intervals?

VO2 Max Tracker ships an update weekly, and Intervals every 9 days. Most recently, VO2 Max Tracker was updated on September 26, 2026 and Intervals on September 24, 2026.

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*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*