# VO2 Max Trainer vs HiiTopia

The clearest difference is rating: HiiTopia at 5.0 against VO2 Max Trainer's 4.0. HiiTopia also leads on in-app purchases (none vs 7) and iOS requirement (15.1 vs 18.6). VO2 Max Trainer's advantage is update cadence (weekly vs every 2 months). On price, ratings volume, ads and device support there is nothing between them.

Both are free to download. VO2 Max Trainer sells 7 in-app purchases, starting at $1.99 per 7 days. HiiTopia asks for nothing beyond the download.

HiiTopia holds the better App Store score, 5.0 against 4.0. Both are backed by a comparable volume of ratings — 4 and 2 respectively.

VO2 Max Trainer ships an update weekly, HiiTopia every 2 months. Both last shipped on October 15, 2026.

## The numbers

| Metric | VO2 Max Trainer | HiiTopia |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [4.0 (4 ratings)](https://appshunter.io/ios/app/vo2-max-trainer-hiit-zone-2/id6736629740/reviews) | **[5.0 (2 ratings)](https://appshunter.io/ios/app/hiitopia/id6756597359/reviews)** |
| Number of ratings | **4** | 2 |
| Positive reviews | 0.0% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | **Weekly** | Every 2 months |
| Monetization | Free with in-app purchases | **Free** |
| Size | 286 MB | 48 MB |
| Requires iOS | 18.6 | **15.1** |
| Devices | **iPhone, iPad, Apple Watch** | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Kevin Floch](https://appshunter.io/developer/1772752224) | [Cristopher Guido](https://appshunter.io/developer/1849716676) |

## What reviewers say

### 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 |


### HiiTopia

[App page](https://appshunter.io/ios/app/hiitopia/id6756597359)

This AI-powered fitness app creates personalized high-intensity interval training routines based on your fitness level and available equipment. It adapts workouts as you progress, offering various training styles for efficient fat burning, muscle building, or endurance improvement.

**Highlights:** AI-customized workouts, Multiple training styles (EMOM, Tabata), Progress tracking and adaptation, Beginner-friendly routines, Flexible equipment options, Short, efficient workouts

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is VO2 Max Trainer free?

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

### Is HiiTopia free?

HiiTopia is free to download, with no in-app purchases.

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

HiiTopia is rated higher. VO2 Max Trainer averages 4.0 out of 5 from 4 ratings, while HiiTopia averages 5.0 from 2 ratings.

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

Neither VO2 Max Trainer nor HiiTopia shows ads.

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

VO2 Max Trainer ships an update weekly, and HiiTopia every 2 months. Most recently, VO2 Max Trainer was updated on October 15, 2026 and HiiTopia on October 15, 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.*