# 测量工具 vs 变声器

The clearest difference is device support: 变声器 at 3 against 测量工具's —. On price, in-app purchases and iOS requirement there is nothing between them.

Both are free to download. 测量工具 sells 2 in-app purchases, starting at $9.99 per month and 变声器 sells 3 in-app purchases, starting at $3.99 per 7 days. Whichever you choose, the download price is not the number that matters.

## The numbers

| Metric | 测量工具 | 变声器 |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | Yes |
| Ads | — | No |
| Update frequency | — | Every 8 days |
| Size | 36 MB | 31 MB |
| Requires iOS | **11.0** | 12.0 |
| Devices | — | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [天宇 贺](https://appshunter.io/developer/1695395584) | [丕苗 包](https://appshunter.io/developer/1612764870) |

## What reviewers say

### 测量工具

[App page](https://appshunter.io/ios/app/ar-and/id6461720498)

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 月度会员 | $9.99 | per month |
| 季度会员 | $29.99 | per 3 months |


### 变声器

[App page](https://appshunter.io/ios/app/id6739523955)

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

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 变声器周会员 | $3.99 | per 7 days |
| 变声器月会员 | $4.99 | per month |
| 变声器年会员 | $24.99 | per year |


## Frequently asked questions

### Is 测量工具 free?

测量工具 is free to download, with in-app purchases available.

### Is 变声器 free?

变声器 is free to download, with in-app purchases available.

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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.*