# SideBooks — PDF＆Comic Viewer

> High-speed PDF and comic viewer with realistic page turns and bookshelf management. (iPhone/iPad app by Tatsumi-system Co., Ltd..)

- Source: https://appshunter.io/ios/app/sidebooks/id409777225 (this page in markdown: same URL + `.md`)
- Developer: [Tatsumi-system Co., Ltd.](https://appshunter.io/developer/409777230)
- Category: Books, Utilities
- Price: Free with in-app purchases
- Rating: 4.60/5 from 96 App Store ratings · 215 written reviews indexed
- Age rating: 4+
- Requires: iOS 9.0 · 32 MB
- Languages: American English, Japanese, Korean, Chinese (Simplified, China), Chinese (Traditional, Taiwan)
- Released: 2010-12-19
- Data updated: 2026-08-31
- Monetization: free with in-app purchases
- User reviews in markdown: https://appshunter.io/ios/app/sidebooks/id409777225/reviews.md

## What is SideBooks?

SideBooks is a high performance, high speed PDF viewer that allows you to enjoy reading with the feel of actual paper.

=Features=

Curl animation that simulates the actual turning of paper pages has been added to the standard page slide function.
Supports viewing from 3 directions, documents that open left to right, right to left and vertically. It provides the optimal environment for viewing any book.
All zoom rates have been optimized providing high speed, dynamic screen display.
An infinite hierarchy of folders can be created, moved, deleted, renamed, etc. using the enhanced bookshelf management function.
Real visual bookshelf function that corresponds to back cover style display.
Files can be imported by 3 methods, Network transfer through Dropbox, USB transfer through iTunes and direct transfer from other applications.
Books can be protected so others cannot view them by using the password protected locking function.
This is a universal application that operates on the iPhone, iPod Touch and iPad.


=Functions=

Overall:
*Brightness Adjustment
*Screen rotates to match the orientation of the device
*Screen Rotation Lock
*Password Protected Start-up Lock

Viewer:
*Support PDF,ZIP,CBZ,RAR and CBR format
*Page Turning: Choose from slide or curl
*Viewing Directions: Choose from opening left to right / right to left / vertically
*Page Spacing: Choose form wide / narrow / none
*Facing Pages: Choose the pair of facing pages by setting the cover to on or off
*Trim function within the range of page display
*Cache pre-read function for the previous and next pages
*Set the display for each book and remember the page number of the last page read
*Text search function (list display type)
*Contents function (also supports hierarchy type)
*Bookmark function (with editable memos)
*Edit handwritten notes
*Send to other applications (Open-In)
*Send by email
*Printing function (Air Print)
*In-page link function
*Link to outside URL function (built-in browser / Safari / Printing)
*Display / Don't Display link buttons
*Page turning function using tap or swipe
*Expansion / Contraction function using pinch and double tap (1-1024x zoom)
*Viewing of encrypted PDF files with password protection
*Display / non-display of statusbar when reading

Bookshelf:
*Display form: Choose form list bookshelf / visual bookshelf
*Function to set theme of visual bookshelf with each folder
*Bookshelf thema extension pack (Add-On)
*Cover editing function (corresponds to the trim)
*File editing function: create, move, delete, setting for all books in folder
*Bookmark list
*Reading history list
*Unread list
*Edit of mark choose form already read / unread
*Book name search function
*Network transfer through Dropbox
*USB transfer through iTunes
*Direct transfer from other applications

Special thanks to, 
"Give My Regards to Black Jack"
SHUHO SATO
Manga on Web
http://mangaonweb.com

## Key features

- Realistic paper curl animation
- Multiple viewing directions
- Enhanced bookshelf management
- Password protection
- Dropbox and iTunes file import
- Supports PDF, ZIP, CBZ, RAR, CBR

## Pricing and in-app purchases

Base price: Free.

**One-time purchases**

| Purchase | Price | Type |
| --- | --- | --- |
| Thema extension Add-On | $0.99 | one-time |


## What do users think of SideBooks?

Overall sentiment: positive

**Pros**

- 🚀 Smooth page turning
- 📚 Great for reading comics and manga
- 🗂️ Excellent folder organization
- 🔍 Useful search and table of contents features
- 💻 Seamless Dropbox integration
- 🎨 Customizable bookshelf display

**Cons**

- 🐛 Crashes when loading large files
- 🚫 Limited file format support (no CBZ/CBR)
- 🔍 Difficult to find and delete books
- 🔒 Requires Dropbox access, no local file support
- 🔍 Small thumbnail size makes it hard to browse

**Commonly reported bugs**

- Crashes when opening certain PDF files
- Corrupted files cause repeated crashes
- Dropbox integration issues on some devices

**Most requested features**

- Add support for ePub and other popular formats
- Implement iCloud/Google Drive integration
- Allow manual rearrangement of bookshelf
- Add dark mode and customizable background options
- Improve bookmark and annotation features
- Implement a more intuitive file management system

## Recent user reviews (10 of 215)

All indexed reviews: https://appshunter.io/ios/app/sidebooks/id409777225/reviews.md

### 4/5 — Own files

*2026-06-27*

Yes, it can save my file to it but, one by one. There is no copy and paste to since its local library cannot be read. When I used open in. It just put one file in it when I selected more than 2 books. Hoping getting easy to get around my own files.

Everything is great. Shelfs and reading. Thank you.

### 4/5 — Two page

*2026-06-03, version 2.89.2*

Please add "two page view" in portrait mode too.

### 2/5 — Broken updates

*2026-05-25, version 2.89.2*

The app changed some setting I assume for iOS 26 compatibility but now the text for the titles of the books is huge. Not sure what they did but the app is broke. 

Test your updates!

### 1/5 — テキスト表示にバグがあり

*2026-04-07*

本棚画面でテキスト表示になり固まって何もできなくなります。
こうなるとアンインストールし再度インストールする羽目になります。
これはテキスト表示のバグだと思われます。
やり方
インストール後初期設定のまま、本を開きますがここでは例としてStandRackGateを開きます。
何ページでもいいですが長押ししテキスト表示をします。
そのまま長押ししたまま上半分画面の枠左から右へスライドします。
テキスト表示されたまま画面が本棚です。

### 5/5 — Works Amazing

*2026-03-12*

The app works great for me. i just add my mangas/comics and it shows up. Relatively easy to add them. Also works offline and in airplane mode.

### 4/5 — Crashing

*2026-02-02, version 2.88.0*

Suddenly crashing when you click next book

### 5/5 — amazing!!! :D 👍

*2026-01-12, version 2.87.1*

I have tried many book readers but this one is definitely the best, the folder feature is amazing and I love how it looks like an actual bookshelf. 
The features are great too, written notes on the pages, memos with the bookmarks, searching and table of contents, it’s perfect!!

And it is free… you are amazing, thank you for this app!!

Here’s a tip for fellow book lovers: some books are available to download on the Internet Archive, so just search for it and filter by text, and see if you can download it! It is free, with no signup or limit! Happy reading! ^^

### 5/5 — good

*2025-12-31, version 2.87.1*

good

### 5/5 — Perfect for RTL documents

*2025-12-29, version 2.87.1*

Very well written app, very simple to use yet very powerful program. Does my arabic document reading very well. Only complaint is, it doesn’t stop the phone from locking while in use, so if it takes longer to read then phone gets locked and you need to unlock it again. Otherwise it’s a great app and free. Well done

### 5/5 — amazing!!! :D 👍

*2025-11-26, version 2.87.1*

I have tried many book readers but this one is definitely the best, the folder feature is amazing and I love how it looks like an actual bookshelf. 
The features are great too, written notes on the pages, memos with the bookmarks, searching and table of contents, it’s perfect!!

And it is free… you are amazing, thank you for this app!!

Here’s a tip for fellow book lovers: some books are available to download on the Internet Archive, so just search for it and filter by text, and see if you can download it! It is free, with no signup or limit! Happy reading! 😊

## Frequently asked questions about SideBooks

### What kind of files can SideBooks open?

SideBooks supports a wide range of file formats, including PDF, ZIP, CBZ, RAR, and CBR. This makes it versatile for reading both documents and various comic book formats.

### How can I import files into SideBooks?

You can import files into SideBooks through several convenient methods. These include network transfer via Dropbox, USB transfer through iTunes, and direct transfer from other applications on your device.

### Does SideBooks offer any security features?

Yes, SideBooks includes a password-protected locking function. This allows you to protect your books and documents, preventing others from viewing them without your permission.

### What makes the reading experience unique?

The app provides a unique reading experience with a curl animation that simulates actual paper page-turning, in addition to standard slide functions. It also offers multiple viewing directions and optimized zoom rates for a dynamic display.

### Is SideBooks available on different Apple devices?

Yes, SideBooks is a universal application designed to operate on the iPhone, iPod Touch, and iPad, ensuring a consistent experience across your Apple devices.

## Version history (last 5 releases)

### 2.90.4 — 2026-08-21

*Minor functional adjustments and bug fixes.

### 2.90.3 — 2026-08-11

*Minor functional adjustments and bug fixes.

### 2.90.2 — 2026-08-04

*Minor functional adjustments and bug fixes.

### 2.90.1 — 2026-08-04

*Minor functional adjustments and bug fixes.

### 2.90.0 — 2026-07-26

*Minor functional adjustments and bug fixes.

## Apps similar to SideBooks

| App | Rating | Price | Category |
| --- | --- | --- | --- |
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| [ComicGlass](https://appshunter.io/ios/app/comicglass/id363992049) | 4.3 (61) | $3.99 | Books |
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| [Amazon Kindle: Reading App](https://appshunter.io/ios/app/amazon-kindle-reading-app/id302584613) | 4.9 (5,800,719) | Free | Books |
| [Epub Reader -read epub,chm,txt](https://appshunter.io/ios/app/epub-reader-read-epubchmtxt/id1296870631) | 4.5 (11,089) | Free | Books |

## Related topics

[comic viewer](https://appshunter.io/ios/topics/comic-viewer) · [ezbook](https://appshunter.io/ios/topics/ezbook)

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*Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-08-31.*