# VO2 Max vs Hydrame

The clearest difference is ads: VO2 Max at none against Hydrame's shown. VO2 Max also leads on device support (3 vs 1). Hydrame's advantage is update cadence (every 2 days vs every 2 weeks). On price, in-app purchases 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 and Hydrame sells 2 in-app purchases, starting at $4.99 per month. Whichever you choose, the download price is not the number that matters.

VO2 Max ships an update every 2 weeks, Hydrame every 2 days. The most recent releases landed on November 4, 2026 and October 28, 2026 respectively.

## The numbers

| Metric | VO2 Max | Hydrame |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[3.8 (131 ratings)](https://appshunter.io/ios/app/vo2-max-widget-notifications/id1394840943/reviews)** | — |
| Number of ratings | **131** | — |
| Positive reviews | 26.8% of reviews | — |
| In-app purchases | Yes | Yes |
| Ads | **No** | Yes |
| Update frequency | Every 2 weeks | **Every 2 days** |
| Monetization | Free with in-app purchases | — |
| Size | 11 MB | 5 MB |
| Requires iOS | 18.0 | **17.0** |
| Devices | **iPhone, iPad, Apple Watch** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [Bernhard Hering](https://appshunter.io/developer/327542085) | [Muhammed Furkan KUCUK](https://appshunter.io/developer/6784363020) |

## 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 |


### Hydrame

[App page](https://appshunter.io/ios/app/hydrame-smart-water-tracker/id6786018429)

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Hydrame Pro - Monthly | $4.99 | per month |
| Hydrame Pro - Lifetime | $89.99 | one-time |


## Frequently asked questions

### Is VO2 Max free?

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

### Is Hydrame free?

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

### Do VO2 Max or Hydrame have ads?

Hydrame shows ads; VO2 Max does not.

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

VO2 Max ships an update every 2 weeks, and Hydrame every 2 days. Most recently, VO2 Max was updated on November 4, 2026 and Hydrame on October 28, 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.*