# VO2 Max vs Just VO2 Max

The clearest difference is rating: Just VO2 Max at 5.0 against VO2 Max's 3.8. Just VO2 Max also leads on in-app purchases (none vs 3). VO2 Max's advantage is ads (none vs shown) and ratings volume (130 vs 3). On price, update cadence, device support and iOS requirement there is nothing between them.

Both are free to download. VO2 Max sells 3 in-app purchases, starting at $2.99 per month. Just VO2 Max asks for nothing beyond the download.

Just VO2 Max holds the better App Store score, 5.0 against 3.8. That said, the two scores are not equally well evidenced: VO2 Max has 130 ratings behind it against 3, so its average is the more settled of the two.

VO2 Max ships an update every 10 days, Just VO2 Max every 5 days. The most recent releases landed on October 20, 2026 and October 13, 2026 respectively.

## The numbers

| Metric | VO2 Max | Just VO2 Max |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [3.8 (130 ratings)](https://appshunter.io/ios/app/vo2-max-widget-notifications/id1394840943/reviews) | **[5.0 (3 ratings)](https://appshunter.io/ios/app/just-vo2-max/id6790672784/reviews)** |
| Number of ratings | **130** | 3 |
| Positive reviews | 26.0% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | **No** | Yes |
| Update frequency | Every 10 days | **Every 5 days** |
| Monetization | Free with in-app purchases | **Ad-supported** |
| Size | 11 MB | 11 MB |
| Requires iOS | 18.0 | **17.0** |
| Devices | **iPhone, iPad, Apple Watch** | iPhone, Apple Watch |
| Age rating | 4+ | 4+ |
| Developer | [Bernhard Hering](https://appshunter.io/developer/327542085) | [Cuprea s.r.o.](https://appshunter.io/developer/6790557326) |

## What reviewers say

### VO2 Max

[App page](https://appshunter.io/ios/app/vo2-max-widget-notifications/id1394840943)

Track your body's oxygen absorption at peak effort with detailed insights and performance estimates for running and cycling. Visualize trends, compare personal bests, and understand your cardio fitness level with a redesigned dashboard and Apple Watch integration.

**Highlights:** VO2 max estimation for running and cycling, Performance estimates (W/kg, FTP), Redesigned dashboard with trends and personal bests, Interactive charts with customizable date ranges, Apple Watch complications and iPhone widgets, Cardio fitness level comparison by age and sex

**Features:** macOS Compatibility, Family Sharing, Apple Watch app, Vision Pro support

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Monthly Subscription | $2.99 | per month |
| Yearly Subscription | $22.99 | per year |
| Lifetime Access | $79.99 | one-time |


### 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 VO2 Max free?

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

### Is Just VO2 Max free?

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

### Which has better reviews, VO2 Max or Just VO2 Max?

Just VO2 Max is rated higher. VO2 Max averages 3.8 out of 5 from 130 ratings, while Just VO2 Max averages 5.0 from 3 ratings.

### Do VO2 Max or Just VO2 Max have ads?

Just VO2 Max shows ads; VO2 Max does not.

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

VO2 Max ships an update every 10 days, and Just VO2 Max every 5 days. Most recently, VO2 Max was updated on October 20, 2026 and Just VO2 Max on October 13, 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.*