# CHM阅读器专业版 vs QRDrop

The clearest difference is in-app purchases: QRDrop at none against CHM阅读器专业版's 3. On price, update cadence, ads and device support there is nothing between them.

Both are free to download. CHM阅读器专业版 sells 3 in-app purchases, starting at $1.99 per month. QRDrop asks for nothing beyond the download.

CHM阅读器专业版 ships an update every 9 days, QRDrop every 6 days. The most recent releases landed on October 2, 2026 and September 29, 2026 respectively.

## The numbers

| Metric | CHM阅读器专业版 | QRDrop |
| --- | --- | --- |
| Price | Free | Free |
| Positive reviews | 60.0% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Every 9 days | **Every 6 days** |
| Monetization | Paid | — |
| Size | 7 MB | 32 MB |
| Requires iOS | 15.6 | **15.0** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [宁伟 陈](https://appshunter.io/developer/1801975672) | [铫 刘](https://appshunter.io/developer/1807203451) |

## What reviewers say

### CHM阅读器专业版

[App page](https://appshunter.io/ios/app/chm/id6746235244)

Easily view CHM files on your iPhone or iPad. This professional reader supports opening documents from various sources, offers quick navigation via table of contents, and includes full-text search. Enjoy comfortable reading with Dark Mode support.

**Highlights:** Open CHM files from Files, Mail, Safari, Automatic table of contents parsing, Full-text search, Dark Mode support, View help documents and tech manuals

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

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 月度会员 | $1.99 | per month |
| 年度会员 | $9.99 | per year |
| 永久会员 | $12.99 | one-time |


### QRDrop

[App page](https://appshunter.io/ios/app/qrdrop-qr-code-file-transfer/id6794542714)

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

**In-app purchases:** none


## Frequently asked questions

### Is CHM阅读器专业版 free?

CHM阅读器专业版 is free to download, with in-app purchases available.

### Is QRDrop free?

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

### Do CHM阅读器专业版 or QRDrop have ads?

Neither CHM阅读器专业版 nor QRDrop shows ads.

### Which is updated more often, CHM阅读器专业版 or QRDrop?

CHM阅读器专业版 ships an update every 9 days, and QRDrop every 6 days. Most recently, CHM阅读器专业版 was updated on October 2, 2026 and QRDrop on September 29, 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.*