# CHM阅读器专业版 vs FileFlip

The clearest difference is price: CHM阅读器专业版 at Free against FileFlip's $2.99. CHM阅读器专业版 also leads on device support (3 vs 1) and iOS requirement (15.6 vs 17.0). FileFlip's advantage is review sentiment (100% vs 57%) and in-app purchases (none vs 3). On update cadence, ads and monetization model there is nothing between them.

CHM阅读器专业版 is free to download; FileFlip costs $2.99 up front. CHM阅读器专业版 sells 3 in-app purchases, starting at $1.99 per month. FileFlip asks for nothing beyond the download.

CHM阅读器专业版 ships an update every 10 days, FileFlip every 3 weeks. The most recent releases landed on October 18, 2026 and October 8, 2026 respectively.

## The numbers

| Metric | CHM阅读器专业版 | FileFlip |
| --- | --- | --- |
| Price | **Free** | $2.99 |
| Rating | — | **[5.0 (1 ratings)](https://appshunter.io/ios/app/fileflip-convert-files/id6794760301/reviews)** |
| Number of ratings | — | **1** |
| Positive reviews | 57.1% of reviews | **100.0% of reviews** |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | **Every 10 days** | Every 3 weeks |
| Monetization | Paid | Paid |
| Size | 7 MB | 1 MB |
| Requires iOS | **15.6** | 17.0 |
| Devices | **iPhone, iPad, iPod** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [宁伟 陈](https://appshunter.io/developer/1801975672) | [Karan Kohli](https://appshunter.io/developer/1896505451) |

## 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 |


### FileFlip

[App page](https://appshunter.io/ios/app/fileflip-convert-files/id6794760301)

Effortlessly convert files between various formats directly on your device. This app supports images, PDFs, audio, video, documents, and data, all processed offline for maximum privacy. Save or share your converted files easily.

**Highlights:** Offline file conversion, Supports multiple file types, Private by design, No network connections, Built-in conversion history, Save or share converted files

**Features:** macOS Compatibility

**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 FileFlip free?

FileFlip costs $2.99, with no in-app purchases.

### Do CHM阅读器专业版 or FileFlip have ads?

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

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

CHM阅读器专业版 ships an update every 10 days, and FileFlip every 3 weeks. Most recently, CHM阅读器专业版 was updated on October 18, 2026 and FileFlip on October 8, 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.*