# 空气小猪 vs CmEcho

The clearest difference is update cadence: CmEcho at every 3 days against 空气小猪's every 3 weeks. CmEcho also leads on device support (4 vs 2) and iOS requirement (13.0 vs 15.1). On price, 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.

空气小猪 ships an update every 3 weeks, CmEcho every 3 days. The most recent releases landed on October 28, 2026 and October 30, 2026 respectively.

## The numbers

| Metric | 空气小猪 | CmEcho |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[5.0 (2 ratings)](https://appshunter.io/ios/app/cmecho/id6756966210/reviews)** |
| Number of ratings | — | **2** |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 3 weeks | **Every 3 days** |
| Monetization | — | Free |
| Size | 47 MB | 64 MB |
| Requires iOS | 15.1 | **13.0** |
| Devices | iPhone, iPod | **iPhone, iPad, iPod, Mac** |
| Age rating | 4+ | 4+ |
| Developer | [金 王](https://appshunter.io/developer/6779260533) | [Lechang Luke Cheng](https://appshunter.io/developer/1813409332) |

## What reviewers say

### 空气小猪

[App page](https://appshunter.io/ios/app/id6748626710)

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

**In-app purchases:** none


### CmEcho

[App page](https://appshunter.io/ios/app/cmecho/id6756966210)

This app offers secure video conferencing and instant messaging with a focus on privacy. It supports one-on-one and group calls, file sharing, and encrypted communication for personal and professional use.

**Highlights:** One-on-one HD video calls, Group video conferencing, Private and group chats, Text, image, and voice messaging, File sharing, Encrypted communication

**Features:** Vision Pro support

**In-app purchases:** none


## Frequently asked questions

### Is 空气小猪 free?

空气小猪 is free to download, with no in-app purchases.

### Is CmEcho free?

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

### Do 空气小猪 or CmEcho have ads?

Neither 空气小猪 nor CmEcho shows ads.

### Which is updated more often, 空气小猪 or CmEcho?

空气小猪 ships an update every 3 weeks, and CmEcho every 3 days. Most recently, 空气小猪 was updated on October 28, 2026 and CmEcho on October 30, 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.*