# 测量工具 vs 海思分级阅读

The clearest difference is in-app purchases: 测量工具 at none against 海思分级阅读's 2. 测量工具 also leads on update cadence (monthly vs every 4 months) and iOS requirement (12.0 vs 14.0). 海思分级阅读's advantage is ads (none vs shown). On price and device support there is nothing between them.

Both are free to download. 海思分级阅读 sells 2 one-off in-app purchases. 测量工具 asks for nothing beyond the download.

测量工具 ships an update monthly, 海思分级阅读 every 4 months. The most recent releases landed on October 29, 2026 and October 27, 2026 respectively.

## The numbers

| Metric | 测量工具 | 海思分级阅读 |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.5 (77 ratings)](https://appshunter.io/ios/app/id1113334130/reviews)** | — |
| Number of ratings | **77** | — |
| Positive reviews | 84.0% of reviews | — |
| In-app purchases | **No** | Yes |
| Ads | Yes | **No** |
| Update frequency | **Monthly** | Every 4 months |
| Monetization | Free with in-app purchases | — |
| Size | 55 MB | 2 MB |
| Requires iOS | **12.0** | 14.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [飞剑 姚](https://appshunter.io/developer/1113334129) | [Beijing Shuya Information Technology Co., LTD](https://appshunter.io/developer/1619754693) |

## What reviewers say

### 测量工具

[App page](https://appshunter.io/ios/app/id1113334130)

This utility app offers a suite of measurement tools for your phone. It includes a ruler, protractor, noise meter, distance calculator, level, compass, and flashlight. Easily measure lengths, angles, sound levels, and more with convenient on-the-go tools.

**Highlights:** Ruler (metric/inch), Noise meter (decibel), Protractor (camera-based), Distance measurement, Level tool, Compass, Flashlight

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

**In-app purchases:** none


### 海思分级阅读

[App page](https://appshunter.io/ios/app/raz/id6736525789)

**Features:** macOS Compatibility

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 海思分级阅读1年会员 | $19.99 | one-time |
| 海思分级阅读5年会员 | $29.99 | one-time |


## Frequently asked questions

### Is 测量工具 free?

测量工具 is free to download, with no in-app purchases.

### Is 海思分级阅读 free?

海思分级阅读 is free to download, with in-app purchases available.

### Do 测量工具 or 海思分级阅读 have ads?

测量工具 shows ads; 海思分级阅读 does not.

### Which is updated more often, 测量工具 or 海思分级阅读?

测量工具 ships an update monthly, and 海思分级阅读 every 4 months. Most recently, 测量工具 was updated on October 29, 2026 and 海思分级阅读 on October 27, 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.*