# 无忧变声器 vs Image Compression Assistant

The clearest difference is in-app purchases: Image Compression Assistant at none against 无忧变声器's 3. Image Compression Assistant also leads on ads (none vs shown) and update cadence (every 3 days vs every 50 months). 无忧变声器's advantage is iOS requirement (13.0 vs 15.1). On price and device support there is nothing between them.

Both are free to download. 无忧变声器 sells 3 one-off in-app purchases. Image Compression Assistant asks for nothing beyond the download.

无忧变声器 ships an update every 50 months, Image Compression Assistant every 3 days. The most recent releases landed on September 14, 2026 and August 29, 2026 respectively.

## The numbers

| Metric | 无忧变声器 | Image Compression Assistant |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | **No** |
| Ads | Yes | **No** |
| Update frequency | Every 50 months | **Every 3 days** |
| Size | 64 MB | 34 MB |
| Requires iOS | **13.0** | 15.1 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [广 吴](https://appshunter.io/developer/926015680) | [俊岚 贺](https://appshunter.io/developer/1892054410) |

## What reviewers say

### 无忧变声器

[App page](https://appshunter.io/ios/app/id1626077904)

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

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 月会员 | $2.99 | one-time |
| 年会员 | $6.99 | one-time |
| 3年会员 | $9.99 | one-time |


### Image Compression Assistant

[App page](https://appshunter.io/ios/app/image-compression-assistant/id6762612155)

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

**In-app purchases:** none


## Frequently asked questions

### Is 无忧变声器 free?

无忧变声器 is free to download, with in-app purchases available.

### Is Image Compression Assistant free?

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

### Do 无忧变声器 or Image Compression Assistant have ads?

无忧变声器 shows ads; Image Compression Assistant does not.

### Which is updated more often, 无忧变声器 or Image Compression Assistant?

无忧变声器 ships an update every 50 months, and Image Compression Assistant every 3 days. Most recently, 无忧变声器 was updated on September 14, 2026 and Image Compression Assistant on August 29, 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.*