# ZoomPhysio vs Watch Hydration

The clearest difference is iOS requirement: ZoomPhysio at 15.6 against Watch Hydration's 17.6. On price, update cadence, ads and in-app purchases there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

ZoomPhysio ships an update every 2 weeks, Watch Hydration every 3 weeks. The most recent releases landed on September 11, 2026 and September 19, 2026 respectively.

## The numbers

| Metric | ZoomPhysio | Watch Hydration |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 2 weeks** | Every 3 weeks |
| Size | 11 MB | 2 MB |
| Requires iOS | **15.6** | 17.6 |
| Devices | iPhone, iPod | iPhone, Apple Watch |
| Age rating | 17+ | 4+ |
| Developer | [ZoomPhysio Ltd](https://appshunter.io/developer/1752480285) | [Thomas Chatting](https://appshunter.io/developer/1811425476) |

## What reviewers say

### ZoomPhysio

[App page](https://appshunter.io/ios/app/zoomphysio/id6505064994)

**Features:** macOS Compatibility

**In-app purchases:** none


### Watch Hydration

[App page](https://appshunter.io/ios/app/watch-hydration/id6745416167)

**Features:** Apple Watch app

**In-app purchases:** none


## Frequently asked questions

### Is ZoomPhysio free?

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

### Is Watch Hydration free?

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

### Do ZoomPhysio or Watch Hydration have ads?

Neither ZoomPhysio nor Watch Hydration shows ads.

### Which is updated more often, ZoomPhysio or Watch Hydration?

ZoomPhysio ships an update every 2 weeks, and Watch Hydration every 3 weeks. Most recently, ZoomPhysio was updated on September 11, 2026 and Watch Hydration on September 19, 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.*