# AirSize vs Chmu

The clearest difference is in-app purchases: Chmu at none against AirSize's 1. AirSize's advantage is device support (3 vs 1) and iOS requirement (15.0 vs 18.0). On price, update cadence and ads there is nothing between them.

Both are free to download. AirSize sells 1 one-off in-app purchase. Chmu asks for nothing beyond the download.

Both ship on a similar rhythm, roughly weekly. The most recent releases landed on October 9, 2026 and October 7, 2026 respectively.

## The numbers

| Metric | AirSize | Chmu |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[5.0 (1 ratings)](https://appshunter.io/ios/app/chmu/id6757212153/reviews)** |
| Number of ratings | — | **1** |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Weekly | Weekly |
| Monetization | — | Free |
| Size | 8 MB | 47 MB |
| Requires iOS | **15.0** | 18.0 |
| Devices | **iPhone, iPad, iPod** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [Shenzhen Dimension Brush Technology Co., Ltd](https://appshunter.io/developer/1855768857) | [SyncSmart](https://appshunter.io/developer/1865363417) |

## What reviewers say

### AirSize

[App page](https://appshunter.io/ios/app/airsize/id6755718658)

**Features:** macOS Compatibility

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 妙测 Pro | $0.99 | one-time |


### Chmu

[App page](https://appshunter.io/ios/app/chmu/id6757212153)

This utility app synchronizes data, controls, and interactions between smart AI glasses and mobile devices. It facilitates seamless management of your connected eyewear experience.

**Highlights:** Data synchronization, Command control, Interaction management, Smart AI glasses integration, Mobile device connectivity

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

**In-app purchases:** none


## Frequently asked questions

### Is AirSize free?

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

### Is Chmu free?

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

### Do AirSize or Chmu have ads?

Neither AirSize nor Chmu shows ads.

### Which is updated more often, AirSize or Chmu?

AirSize ships an update weekly, and Chmu weekly. Most recently, AirSize was updated on October 9, 2026 and Chmu on October 7, 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.*