# 分贝检测专家 vs Useless Keyboard

The clearest difference is in-app purchases: Useless Keyboard at none against 分贝检测专家's 2. 分贝检测专家's advantage is iOS requirement (11.2 vs 15.0). On price, ads and device support there is nothing between them.

Both are free to download. 分贝检测专家 sells 2 in-app purchases, starting at $0.99 per 7 days. Useless Keyboard asks for nothing beyond the download.

## The numbers

| Metric | 分贝检测专家 | Useless Keyboard |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | — | Every 2 months |
| Size | 92 MB | 70 MB |
| Requires iOS | **11.2** | 15.0 |
| Devices | iPhone, iPod | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [少红 凡](https://appshunter.io/developer/1830162834) | [航 王](https://appshunter.io/developer/1895845885) |

## What reviewers say

### 分贝检测专家

[App page](https://appshunter.io/ios/app/id6443487669)

**Features:** Vision Pro support

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 工业级分贝检测 | $0.99 | per 7 days |
| 工业级分贝检测 | $2.49 | per 3 months |


### Useless Keyboard

[App page](https://appshunter.io/ios/app/useless-keyboard/id6767942154)

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

**In-app purchases:** none


## Frequently asked questions

### Is 分贝检测专家 free?

分贝检测专家 is free to download, with in-app purchases available.

### Is Useless Keyboard free?

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

### Do 分贝检测专家 or Useless Keyboard have ads?

Neither 分贝检测专家 nor Useless Keyboard shows ads.

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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.*