# 图片格式转换 vs 图片转压

The clearest difference is in-app purchases: 图片转压 at none against 图片格式转换's 3. 图片转压 also leads on ads (none vs shown) and iOS requirement (12.0 vs 16.0). 图片格式转换's advantage is update cadence (weekly vs every 12 months). On price and device support there is nothing between them.

Both are free to download. 图片格式转换 sells 3 in-app purchases, starting at $3.99 per month. 图片转压 asks for nothing beyond the download.

图片格式转换 ships an update weekly, 图片转压 every 12 months. The most recent releases landed on September 14, 2026 and September 11, 2026 respectively.

## The numbers

| Metric | 图片格式转换 | 图片转压 |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | **No** |
| Ads | Yes | **No** |
| Update frequency | **Weekly** | Every 12 months |
| Size | 61 MB | 83 MB |
| Requires iOS | 16.0 | **12.0** |
| Devices | iPhone, iPad | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [子豪 张](https://appshunter.io/developer/1625809217) | [静 胡](https://appshunter.io/developer/1687913013) |

## What reviewers say

### 图片格式转换

[App page](https://appshunter.io/ios/app/id6446273369)

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

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Month Membership | $3.99 | per month |
| Season Membership | $9.99 | per 3 months |
| Year Membership | $19.99 | per year |


### 图片转压

[App page](https://appshunter.io/ios/app/id6479608625)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is 图片格式转换 free?

图片格式转换 is free to download, with in-app purchases available.

### Is 图片转压 free?

图片转压 is free to download, with no in-app purchases.

### Do 图片格式转换 or 图片转压 have ads?

图片格式转换 shows ads; 图片转压 does not.

### Which is updated more often, 图片格式转换 or 图片转压?

图片格式转换 ships an update weekly, and 图片转压 every 12 months. Most recently, 图片格式转换 was updated on September 14, 2026 and 图片转压 on September 11, 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.*