# 玉成蓝牙工具 vs TRN Audio

The clearest difference is update cadence: TRN Audio at weekly against 玉成蓝牙工具's every 4 months. TRN Audio also leads on iOS requirement (13.0 vs 15.0). On price, ads, in-app purchases and device support there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

玉成蓝牙工具 ships an update every 4 months, TRN Audio weekly. The most recent releases landed on November 3, 2026 and October 31, 2026 respectively.

## The numbers

| Metric | 玉成蓝牙工具 | TRN Audio |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 4 months | **Weekly** |
| Size | 30 MB | 34 MB |
| Requires iOS | 15.0 | **13.0** |
| Devices | iPhone, iPod | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Shenzhen Yucheng Innovation Technology Co., Ltd.](https://appshunter.io/developer/1439392937) | [娟 伍](https://appshunter.io/developer/6793145741) |

## What reviewers say

### 玉成蓝牙工具

[App page](https://appshunter.io/ios/app/id1515844806)

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

**In-app purchases:** none


### TRN Audio

[App page](https://appshunter.io/ios/app/trn-audio/id6798907124)

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

**In-app purchases:** none


## Frequently asked questions

### Is 玉成蓝牙工具 free?

玉成蓝牙工具 is free to download, with no in-app purchases.

### Is TRN Audio free?

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

### Do 玉成蓝牙工具 or TRN Audio have ads?

Neither 玉成蓝牙工具 nor TRN Audio shows ads.

### Which is updated more often, 玉成蓝牙工具 or TRN Audio?

玉成蓝牙工具 ships an update every 4 months, and TRN Audio weekly. Most recently, 玉成蓝牙工具 was updated on November 3, 2026 and TRN Audio 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.*