# 清灰大师 vs PL

The clearest difference is in-app purchases: PL at none against 清灰大师's 2. PL also leads on ads (none vs shown) and update cadence (every 5 months vs every 58 months). On price, device support and iOS requirement there is nothing between them.

Both are free to download. 清灰大师 sells 2 one-off in-app purchases. PL asks for nothing beyond the download.

清灰大师 ships an update every 58 months, PL every 5 months. The most recent releases landed on October 27, 2026 and October 25, 2026 respectively.

## The numbers

| Metric | 清灰大师 | PL |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | **No** |
| Ads | Yes | **No** |
| Update frequency | Every 58 months | **Every 5 months** |
| Monetization | Free with in-app purchases | — |
| Size | 53 MB | 10 MB |
| Requires iOS | 13.0 | 13.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 12+ | 4+ |
| Developer | [广州艾拉网络技术有限公司](https://appshunter.io/developer/1484448635) | [Routon Electronic Co.,Ltd.](https://appshunter.io/developer/1119479466) |

## What reviewers say

### 清灰大师

[App page](https://appshunter.io/ios/app/id1576168709)

This utility app helps iPhone users quickly test their device's audio components. It checks speakers, earpieces, microphones, and sound channels with test tones and recording features. Ideal for routine checks or confirming repairs.

**Highlights:** Speaker testing, Earpiece testing, Microphone testing, Left/Right channel test, Frequency testing, Device self-check

**Features:** macOS Compatibility

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 您将花费6RMB购买终身去除限制 | $0.99 | one-time |
| 您将花费30RMB购买终身去除广告 | $4.99 | one-time |


### PL

[App page](https://appshunter.io/ios/app/pl-evc/id6478146710)

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

**In-app purchases:** none


## Frequently asked questions

### Is 清灰大师 free?

清灰大师 is free to download, with in-app purchases available.

### Is PL free?

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

### Do 清灰大师 or PL have ads?

清灰大师 shows ads; PL does not.

### Which is updated more often, 清灰大师 or PL?

清灰大师 ships an update every 58 months, and PL every 5 months. Most recently, 清灰大师 was updated on October 27, 2026 and PL on October 25, 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.*