PDF Reader vs CHM+
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
PDF Reader
This app allows you to read various document formats like PDF, EPUB, and CHM on your iPhone and iPad. It supports file import, text search, annotation, and even previewing MS Office files and videos. A simple to-do list and auto-save reading progress are also included.
- Reads PDF, CHM, EPUB, TXT files
- PDF annotation and text search
- File import via Files, Airdrop, iTunes, web
- MS Office and video file preview
- Simple To-Do list functionality
- Auto-save reading progress
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PDF Reader - Mini Version is an amazing reader App on iPhone and iPad Main Fatures: 1. support read pdf、chm、epub、txt file 2. support pdf annotation and text search 3. support import file via Files、Airdrop、iTunes、web browser 4. support MS office Word、Excel、PPT、Video and many other file types preview 5. support simple Todo list 6. support auto save reading progress 7. support Baidu Net Disk
CHM+
This app provides a streamlined way to read CHM documents on iOS devices. It offers quick import from local storage and iCloud, fast opening of large files, and efficient chapter navigation. Enjoy a smooth reading experience with support for multiple encodings.
- Quick document import (local storage, iCloud)
- Fast opening of large CHM files
- Table of contents chapter switching
- Multi-screen collaboration on iPad
- Support for multiple encoding types
- Smooth reading experience
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CHM+ focuses on enhancing the reading experience of CHM documents on the iOS platform. Main features: - Quick document import: Supports importing CHM documents from local storage and iCloud. - Fast opening of extremely large files. - Quick chapter switching: Supports switching by table of contents and quick switching in the order of the table of contents. - Multi-screen collaboration: Available for iPad. - Support for multiple encoding types. - A smooth reading experience.
Screenshots
Verdict
The clearest difference is rating: PDF Reader at 4.9 against CHM+'s 3.0. PDF Reader also leads on ads (none vs shown) and ratings volume (8 vs 2). CHM+'s advantage is review sentiment (83% vs 71%). On price, update cadence, in-app purchases and monetization model there is nothing between them.
Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS
Both are free to download. PDF Reader sells 5 one-off in-app purchases and CHM+ sells 1 one-off in-app purchase. Whichever you choose, the download price is not the number that matters.
PDF Reader holds the better App Store score, 4.9 against 3.0. Both are backed by a comparable volume of ratings — 8 and 2 respectively. Written reviews complicate that: 71% of PDF Reader's written reviews are positive against 83% of CHM+'s, so the app with the better star average is not the one people write more warmly about.
PDF Reader ships an update every 3 weeks, CHM+ every 6 weeks. The most recent releases landed on September 25, 2026 and September 26, 2026 respectively.
| Parameter | PDF Reader | CHM+ |
|---|---|---|
| Price | Free | Free |
| Rating | 4.9 (8 ratings) — better | 3.0 (2 ratings) |
| Positive reviews | 71.4% of reviews | 83.3% of reviews — better |
| Number of ratings | 8 — better | 2 |
| Update frequency | Every 3 weeks — better | Every 6 weeks |
| Ads | No — better | Yes |
| In-app purchases | Yes | Yes |
| Monetization | Free with in-app purchases | Free with in-app purchases |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Requires iOS | 12.0 — better | 15.0 |
| Further details — not scored | ||
| Size | 50 MB | 16 MB |
| Age rating | 4+ | 4+ |
| Developer | 绪强 任 | 俊锋 仝 |
Customer experience
PDF Reader
CHM+
In-app purchases
PDF Reader
- Reader App donate$0.99
- Dropbox Support$0.99
- Remove Ad$4.99
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- Todo donate$7.99
- Todo donate$14.99
CHM+
- CHM Pro$4.99
