# Air Compression vs Cold Knee Massager

The clearest difference is iOS requirement: Cold Knee Massager at 13.0 against Air Compression's 15.6. On price, ads, in-app purchases and device support there is nothing between them.

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

## The numbers

| Metric | Air Compression | Cold Knee Massager |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | — | Every 3 weeks |
| Size | 2 MB | 33 MB |
| Requires iOS | 15.6 | **13.0** |
| Devices | iPhone, iPod | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Guangzhou Beite Electronic Science & Technology Co., Ltd.](https://appshunter.io/developer/1816833063) | [海洋 刘](https://appshunter.io/developer/1736870190) |

## What reviewers say

### Air Compression

[App page](https://appshunter.io/ios/app/air-compression/id6746424973)

**Features:** macOS Compatibility

**In-app purchases:** none


### Cold Knee Massager

[App page](https://appshunter.io/ios/app/cold-knee-massager/id6770961174)

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

**In-app purchases:** none


## Frequently asked questions

### Is Air Compression free?

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

### Is Cold Knee Massager free?

Cold Knee Massager is free to download, with no in-app purchases.

### Do Air Compression or Cold Knee Massager have ads?

Neither Air Compression nor Cold Knee Massager shows ads.

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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.*