# WatchFit vs VO2 Max Trainer

The clearest difference is review sentiment: WatchFit at 82% against VO2 Max Trainer's 0%. WatchFit also leads on rating (4.9 vs 3.0) and ratings volume (34 vs 2). VO2 Max Trainer's advantage is update cadence (weekly vs every 3 weeks) and device support (3 vs 1). On price, ads, in-app purchases and monetization model there is nothing between them.

Both are free to download. WatchFit sells 5 in-app purchases, starting at $1.99 per month and VO2 Max Trainer sells 7 in-app purchases, starting at $1.99 per 7 days. Whichever you choose, the download price is not the number that matters.

WatchFit holds the better App Store score, 4.9 against 3.0. That said, the two scores are not equally well evidenced: WatchFit has 34 ratings behind it against 2, so its average is the more settled of the two. Written reviews point the same way: 82% of WatchFit's written reviews are positive against 0% of VO2 Max Trainer's.

WatchFit ships an update every 3 weeks, VO2 Max Trainer weekly. The most recent releases landed on September 15, 2026 and September 10, 2026 respectively.

## The numbers

| Metric | WatchFit | VO2 Max Trainer |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.9 (34 ratings)](https://appshunter.io/ios/app/watchfit-custom-watch-workout/id6464086175/reviews)** | [3.0 (2 ratings)](https://appshunter.io/ios/app/vo2-max-trainer-hiit-zone-2/id6736629740/reviews) |
| Number of ratings | **34** | 2 |
| Positive reviews | **81.8% of reviews** | 0.0% of reviews |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | Every 3 weeks | **Weekly** |
| Monetization | Freemium | Free with in-app purchases |
| Size | 17 MB | 81 MB |
| Requires iOS | **17.0** | 17.6 |
| Devices | iPhone | **iPhone, iPad, Apple Watch** |
| Age rating | 4+ | 4+ |
| Developer | [Mathieu Savaria](https://appshunter.io/developer/1530993084) | [Kevin Floch](https://appshunter.io/developer/1772752224) |

## What reviewers say

### WatchFit

[App page](https://appshunter.io/ios/app/watchfit-custom-watch-workout/id6464086175)

Create and schedule custom workouts directly on your Apple Watch. Tailor intervals, warm-ups, and cool-downs with time or distance-based steps. Receive real-time alerts for pace and heart rate to optimize your training.

**Highlights:** Custom workout creation, Apple Watch integration, Interval and phase customization, Time and distance-based steps, Heart rate and pace alerts, Calendar integration, No account required

**Features:** Family Sharing

**In-app purchases (5)**

| Purchase | Price | Billing |
| --- | --- | --- |
| WatchFit Premium | $1.99 | per month |
| WatchFit Premium | $9.99 | per year |
| WatchFit Premium (Special) | Free | one-time |
| WatchFit Premium (Sale) | $9.99 | one-time |
| WatchFit Premium (Lifetime) | $19.99 | one-time |


### VO2 Max Trainer

[App page](https://appshunter.io/ios/app/vo2-max-trainer-hiit-zone-2/id6736629740)

Measure, track, and improve your VO2 Max with a variety of fitness tests and personalized training plans. Features include HIIT and Zone 2 workouts, progress tracking, and integration with Apple Watch and HealthKit.

**Highlights:** Measure VO2 Max with 5 fitness tests, HIIT and Zone 2 training, Track progress and compare to leaderboards, Apple Watch integration, HealthKit integration, Training readiness scoring, Fitness age calculation

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

**In-app purchases (7)**

| Purchase | Price | Billing |
| --- | --- | --- |
| VO2_Weekly | $1.99 | per 7 days |
| VO2_Monthly | $1.99 | per month |
| VO2_Annually | $14.99 | per year |
| VO2_Lifetime_Upgrade | $9.99 | one-time |
| VO2_Lifetime_Upgrade2 | $14.99 | one-time |
| VO2_Lifetime | $19.99 | one-time |
| VO2_Lifetime2 | $29.99 | one-time |


## Frequently asked questions

### Is WatchFit free?

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

### Is VO2 Max Trainer free?

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

### Which has better reviews, WatchFit or VO2 Max Trainer?

WatchFit is rated higher. WatchFit averages 4.9 out of 5 from 34 ratings, while VO2 Max Trainer averages 3.0 from 2 ratings.

### Do WatchFit or VO2 Max Trainer have ads?

Neither WatchFit nor VO2 Max Trainer shows ads.

### Which is updated more often, WatchFit or VO2 Max Trainer?

WatchFit ships an update every 3 weeks, and VO2 Max Trainer weekly. Most recently, WatchFit was updated on September 15, 2026 and VO2 Max Trainer on September 10, 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.*