# SideBooks vs BookSlide

The clearest difference is in-app purchases: BookSlide at none against SideBooks's 1. SideBooks's advantage is update cadence (every 9 days vs every 3 weeks) and device support (3 vs 1). On price and ads there is nothing between them.

Both are free to download. SideBooks sells 1 one-off in-app purchase. BookSlide asks for nothing beyond the download.

SideBooks ships an update every 9 days, BookSlide every 3 weeks. The most recent releases landed on October 17, 2026 and October 1, 2026 respectively.

## The numbers

| Metric | SideBooks | BookSlide |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.6 (97 ratings)](https://appshunter.io/ios/app/sidebooks/id409777225/reviews)** | — |
| Number of ratings | **97** | — |
| Positive reviews | 73.7% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | **Every 9 days** | Every 3 weeks |
| Monetization | Free with in-app purchases | — |
| Size | 32 MB | 8 MB |
| Requires iOS | **9.0** | 18.6 |
| Devices | **iPhone, iPad, iPod** | iPhone |
| Age rating | 4+ | 9+ |
| Developer | [Tatsumi-system Co., Ltd.](https://appshunter.io/developer/409777230) | [Jorge Carlos Borges Ku](https://appshunter.io/developer/986374611) |

## What reviewers say

### SideBooks

[App page](https://appshunter.io/ios/app/sidebooks/id409777225)

This app offers a high-performance PDF and comic viewer with realistic paper-turning animations. It supports various viewing directions, enhanced bookshelf management, and secure password protection for your documents. Easily import files from multiple sources and enjoy a customizable reading experience.

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

**Features:** macOS Compatibility

**In-app purchases (1)**

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

**What reviewers like**

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

**What reviewers complain about**

- 🐛 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

**Reported bugs**

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

**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


### BookSlide

[App page](https://appshunter.io/ios/app/bookslide/id6756859398)

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

**In-app purchases:** none


## Frequently asked questions

### Is SideBooks free?

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

### Is BookSlide free?

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

### Do SideBooks or BookSlide have ads?

Neither SideBooks nor BookSlide shows ads.

### Which is updated more often, SideBooks or BookSlide?

SideBooks ships an update every 9 days, and BookSlide every 3 weeks. Most recently, SideBooks was updated on October 17, 2026 and BookSlide on October 1, 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.*