# CHM Sharp vs 测量工具

The clearest difference is rating: 测量工具 at 4.5 against CHM Sharp's 3.8. 测量工具 also leads on in-app purchases (none vs 1) and update cadence (monthly vs every 4 months). On price, ads, monetization model and device support there is nothing between them.

Both are free to download. CHM Sharp sells 1 one-off in-app purchase. 测量工具 asks for nothing beyond the download.

测量工具 holds the better App Store score, 4.5 against 3.8. That said, the two scores are not equally well evidenced: 测量工具 has 77 ratings behind it against 11, so its average is the more settled of the two. Written reviews point the same way: 67% of CHM Sharp's written reviews are positive against 84% of 测量工具's.

CHM Sharp ships an update every 4 months, 测量工具 monthly. Both last shipped on October 17, 2026.

## The numbers

| Metric | CHM Sharp | 测量工具 |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [3.8 (11 ratings)](https://appshunter.io/ios/app/chm-sharp/id467098001/reviews) | **[4.5 (77 ratings)](https://appshunter.io/ios/app/id1113334130/reviews)** |
| Number of ratings | 11 | **77** |
| Positive reviews | 67.3% of reviews | **84.0% of reviews** |
| In-app purchases | Yes | **No** |
| Ads | Yes | Yes |
| Update frequency | Every 4 months | **Monthly** |
| Monetization | Free with in-app purchases | Free with in-app purchases |
| Size | 25 MB | 55 MB |
| Requires iOS | 14.0 | **12.0** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [锦文 游](https://appshunter.io/developer/406832160) | [飞剑 姚](https://appshunter.io/developer/1113334129) |

## What reviewers say

### CHM Sharp

[App page](https://appshunter.io/ios/app/chm-sharp/id467098001)

This app is a reader for CHM (Microsoft Compiled HTML Help) documents on iOS devices. It allows for file management, searching within documents, and various viewing options. Transfer files easily via Wi-Fi or iTunes.

**Highlights:** CHM document reader, File sorting and searching, File management (copy, move, delete), Wi-Fi and iTunes file transfer, In-document search and highlighting, Pinch-to-zoom support, Bookmark functionality

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Full Version | $0.99 | one-time |


### 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


## Frequently asked questions

### Is CHM Sharp free?

CHM Sharp is free to download, with in-app purchases available.

### Is 测量工具 free?

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

### Which has better reviews, CHM Sharp or 测量工具?

测量工具 is rated higher. CHM Sharp averages 3.8 out of 5 from 11 ratings, while 测量工具 averages 4.5 from 77 ratings.

### Do CHM Sharp or 测量工具 have ads?

Both CHM Sharp and 测量工具 show ads.

### Which is updated more often, CHM Sharp or 测量工具?

CHM Sharp ships an update every 4 months, and 测量工具 monthly. Most recently, CHM Sharp was updated on October 17, 2026 and 测量工具 on October 17, 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.*