# CHM Sharp vs YDReader

The clearest difference is rating: YDReader at 4.6 against CHM Sharp's 3.8. YDReader also leads on ads (none vs shown) and update cadence (fortnightly vs every 4 months). On price, in-app purchases, monetization model and device support there is nothing between them.

Both are free to download. CHM Sharp sells 1 one-off in-app purchase and YDReader sells 2 one-off in-app purchases. Whichever you choose, the download price is not the number that matters.

YDReader holds the better App Store score, 4.6 against 3.8. Both are backed by a comparable volume of ratings — 11 and 49 respectively. Written reviews point the same way: 68% of CHM Sharp's written reviews are positive against 87% of YDReader's.

CHM Sharp ships an update every 4 months, YDReader fortnightly. The most recent releases landed on September 9, 2026 and September 8, 2026 respectively.

## The numbers

| Metric | CHM Sharp | YDReader |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [3.8 (11 ratings)](https://appshunter.io/ios/app/chm-sharp/id467098001/reviews) | **[4.6 (49 ratings)](https://appshunter.io/ios/app/ydreader-epubandmobireader/id1488737276/reviews)** |
| Number of ratings | 11 | **49** |
| Positive reviews | 68.0% of reviews | **87.0% of reviews** |
| In-app purchases | Yes | Yes |
| Ads | Yes | **No** |
| Update frequency | Every 4 months | **Fortnightly** |
| Monetization | Free with in-app purchases | Free with in-app purchases |
| Size | 25 MB | 37 MB |
| Requires iOS | 14.0 | **12.1** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 17+ |
| Developer | [锦文 游](https://appshunter.io/developer/406832160) | [福中 王](https://appshunter.io/developer/920377229) |

## 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 |


### YDReader

[App page](https://appshunter.io/ios/app/ydreader-epubandmobireader/id1488737276)

Read TXT, Epub, MOBi, and AZW3 files with extensive customization options for fonts, colors, and spacing. This app also supports decompression of ZIP, RAR, and 7Z archives, and compression into ZIP and 7z formats.

**Highlights:** Ebook reading (TXT, Epub, MOBi, AZW3), Customizable reading experience, File decompression (ZIP, RAR, 7Z), File compression (ZIP, 7Z)

**Features:** macOS Compatibility

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 1元购买100金币 | $0.99 | one-time |
| 18元购买9999金币 | $2.99 | one-time |


## Frequently asked questions

### Is CHM Sharp free?

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

### Is YDReader free?

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

### Which has better reviews, CHM Sharp or YDReader?

YDReader is rated higher. CHM Sharp averages 3.8 out of 5 from 11 ratings, while YDReader averages 4.6 from 49 ratings.

### Do CHM Sharp or YDReader have ads?

CHM Sharp shows ads; YDReader does not.

### Which is updated more often, CHM Sharp or YDReader?

CHM Sharp ships an update every 4 months, and YDReader fortnightly. Most recently, CHM Sharp was updated on September 9, 2026 and YDReader on September 8, 2026.

---

*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*