# 格式转换助手 vs 天宇铃声

The clearest difference is in-app purchases: 天宇铃声 at none against 格式转换助手's 3. 天宇铃声 also leads on update cadence (fortnightly vs every 5 months). 格式转换助手's advantage is ads (none vs shown) and device support (4 vs 2). On price and iOS requirement there is nothing between them.

Both are free to download. 格式转换助手 sells 3 one-off in-app purchases. 天宇铃声 asks for nothing beyond the download.

格式转换助手 ships an update every 5 months, 天宇铃声 fortnightly. The most recent releases landed on October 27, 2026 and October 31, 2026 respectively.

## The numbers

| Metric | 格式转换助手 | 天宇铃声 |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | **No** |
| Ads | **No** | Yes |
| Update frequency | Every 5 months | **Fortnightly** |
| Size | 32 MB | 102 MB |
| Requires iOS | **15.0** | 15.6 |
| Devices | **iPhone, iPad, iPod, Mac** | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [QQY.LTD](https://appshunter.io/developer/1743706249) | [广西要牛网络科技有限公司](https://appshunter.io/developer/1530662752) |

## What reviewers say

### 格式转换助手

[App page](https://appshunter.io/ios/app/id6670539731)

**Features:** Vision Pro support

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 月卡 | $0.99 | one-time |
| 季卡 | $2.99 | one-time |
| 年卡 | $9.99 | one-time |


### 天宇铃声

[App page](https://appshunter.io/ios/app/id6763219661)

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

**In-app purchases:** none


## Frequently asked questions

### Is 格式转换助手 free?

格式转换助手 is free to download, with in-app purchases available.

### Is 天宇铃声 free?

天宇铃声 is free to download, with no in-app purchases.

### Do 格式转换助手 or 天宇铃声 have ads?

天宇铃声 shows ads; 格式转换助手 does not.

### Which is updated more often, 格式转换助手 or 天宇铃声?

格式转换助手 ships an update every 5 months, and 天宇铃声 fortnightly. Most recently, 格式转换助手 was updated on October 27, 2026 and 天宇铃声 on October 31, 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.*