# MP3 Converter vs 换机助手

The clearest difference is in-app purchases: 换机助手 at none against MP3 Converter's 2. MP3 Converter's advantage is ads (none vs shown) and update cadence (every 3 days vs every 3 weeks). On price, device support and iOS requirement there is nothing between them.

Both are free to download. MP3 Converter sells 2 in-app purchases, starting at $3.99 per 7 days. 换机助手 asks for nothing beyond the download.

MP3 Converter ships an update every 3 days, 换机助手 every 3 weeks. The most recent releases landed on October 5, 2026 and October 18, 2026 respectively.

## The numbers

| Metric | MP3 Converter | 换机助手 |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | **No** |
| Ads | **No** | Yes |
| Update frequency | **Every 3 days** | Every 3 weeks |
| Size | 24 MB | 11 MB |
| Requires iOS | 15.6 | 15.6 |
| Devices | iPhone, iPod | iPhone, iPod |
| Age rating | 4+ | 17+ |
| Developer | [娟娟 郭](https://appshunter.io/developer/1811815593) | [宏立 刘](https://appshunter.io/developer/6774631738) |

## What reviewers say

### MP3 Converter

[App page](https://appshunter.io/ios/app/mp3-converter-lossless-hd/id6768694178)

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| MP3 Converter Weekly Pro | $3.99 | per 7 days |
| MP3 Converter Forever Pro | $14.99 | one-time |


### 换机助手

[App page](https://appshunter.io/ios/app/app/id6797737676)

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

**In-app purchases:** none


## Frequently asked questions

### Is MP3 Converter free?

MP3 Converter is free to download, with in-app purchases available.

### Is 换机助手 free?

换机助手 is free to download, with no in-app purchases.

### Do MP3 Converter or 换机助手 have ads?

换机助手 shows ads; MP3 Converter does not.

### Which is updated more often, MP3 Converter or 换机助手?

MP3 Converter ships an update every 3 days, and 换机助手 every 3 weeks. Most recently, MP3 Converter was updated on October 5, 2026 and 换机助手 on October 18, 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.*