# VO2Max Hiit Workout vs Just VO2 Max

The clearest difference is rating: Just VO2 Max at 5.0 against VO2Max Hiit Workout's 2.0. Just VO2 Max also leads on ratings volume (3 vs 1). VO2Max Hiit Workout's advantage is iOS requirement (15.6 vs 17.0). On price, update cadence, ads and in-app purchases there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

Just VO2 Max holds the better App Store score, 5.0 against 2.0. Both are backed by a comparable volume of ratings — 1 and 3 respectively.

VO2Max Hiit Workout ships an update every 10 days, Just VO2 Max every 6 days. The most recent releases landed on November 4, 2026 and October 31, 2026 respectively.

## The numbers

| Metric | VO2Max Hiit Workout | Just VO2 Max |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [2.0 (1 ratings)](https://appshunter.io/ios/app/vo2max-hiit-workout/id6475713309/reviews) | **[5.0 (3 ratings)](https://appshunter.io/ios/app/just-vo2-max/id6790672784/reviews)** |
| Number of ratings | 1 | **3** |
| In-app purchases | No | No |
| Ads | Yes | Yes |
| Update frequency | Every 10 days | **Every 6 days** |
| Monetization | Ad-supported | Ad-supported |
| Size | 104 MB | 14 MB |
| Requires iOS | **15.6** | 17.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, Apple Watch |
| Age rating | 12+ | 4+ |
| Developer | [Unscripted Engineering](https://appshunter.io/developer/1635849108) | [Cuprea s.r.o.](https://appshunter.io/developer/6790557326) |

## What reviewers say

### VO2Max Hiit Workout

[App page](https://appshunter.io/ios/app/vo2max-hiit-workout/id6475713309)

Boost your aerobic capacity with science-backed HIIT protocols. This app offers precise, customizable interval training sessions designed by athletes. Train longer with optimized battery usage.

**Highlights:** Science-backed HIIT protocols, Customizable workouts, Precise interval timers, Low battery drain, Multiple training types (Norwegian 4x4, Tabata, Wingate)

**Features:** macOS Compatibility

**In-app purchases:** none


### Just VO2 Max

[App page](https://appshunter.io/ios/app/just-vo2-max/id6790672784)

Displays your most recent VO2 Max reading from Apple Health directly on your Apple Watch face. It refreshes automatically when new data is available after your workout, keeping your health information private and on your device.

**Highlights:** VO2 Max display, Apple Health integration, Automatic refresh, On-device data storage, Read-only data access

**Features:** Apple Watch app

**In-app purchases:** none


## Frequently asked questions

### Is VO2Max Hiit Workout free?

VO2Max Hiit Workout is free to download, with no in-app purchases.

### Is Just VO2 Max free?

Just VO2 Max is free to download, with no in-app purchases.

### Which has better reviews, VO2Max Hiit Workout or Just VO2 Max?

Just VO2 Max is rated higher. VO2Max Hiit Workout averages 2.0 out of 5 from 1 ratings, while Just VO2 Max averages 5.0 from 3 ratings.

### Do VO2Max Hiit Workout or Just VO2 Max have ads?

Both VO2Max Hiit Workout and Just VO2 Max show ads.

### Which is updated more often, VO2Max Hiit Workout or Just VO2 Max?

VO2Max Hiit Workout ships an update every 10 days, and Just VO2 Max every 6 days. Most recently, VO2Max Hiit Workout was updated on November 4, 2026 and Just VO2 Max on October 31, 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.*