# VO2 Max vs Viscera

The clearest difference is price: VO2 Max at Free against Viscera's $1.99. VO2 Max also leads on update cadence (every 10 days vs monthly). Viscera's advantage is in-app purchases (none vs 3). On ads, device support and iOS requirement there is nothing between them.

VO2 Max is free to download; Viscera costs $1.99 up front. VO2 Max sells 3 in-app purchases, starting at $2.99 per month. Viscera asks for nothing beyond the download.

VO2 Max ships an update every 10 days, Viscera monthly. The most recent releases landed on October 16, 2026 and October 17, 2026 respectively.

## The numbers

| Metric | VO2 Max | Viscera |
| --- | --- | --- |
| Price | **Free** | $1.99 |
| Rating | **[3.8 (129 ratings)](https://appshunter.io/ios/app/vo2-max-widget-notifications/id1394840943/reviews)** | — |
| Number of ratings | **129** | — |
| Positive reviews | 26.0% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | **Every 10 days** | Monthly |
| Monetization | Free with in-app purchases | — |
| Size | 11 MB | 3 MB |
| Requires iOS | **18.0** | 18.5 |
| Devices | **iPhone, iPad, Apple Watch** | iPhone, iPad |
| Age rating | 4+ | 17+ |
| Developer | [Bernhard Hering](https://appshunter.io/developer/327542085) | [Hans Christian Christensen](https://appshunter.io/developer/1843828134) |

## 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 |


### Viscera

[App page](https://appshunter.io/ios/app/viscera/id6753583907)

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases:** none


## Frequently asked questions

### Is VO2 Max free?

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

### Is Viscera free?

Viscera costs $1.99, with no in-app purchases.

### Do VO2 Max or Viscera have ads?

Neither VO2 Max nor Viscera shows ads.

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

VO2 Max ships an update every 10 days, and Viscera monthly. Most recently, VO2 Max was updated on October 16, 2026 and Viscera on October 17, 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.*