# BookFolder vs Book.io

The clearest difference is update cadence: BookFolder at every 6 days against Book.io's every 2 months. BookFolder also leads on iOS requirement (14.0 vs 16.0). Book.io's advantage is review sentiment (97% vs 88%). On price, rating, ratings volume and ads there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

Book.io holds the better App Store score, 4.8 against 4.7. Both are backed by a comparable volume of ratings — 28 and 58 respectively. Written reviews point the same way: 88% of BookFolder's written reviews are positive against 97% of Book.io's.

BookFolder ships an update every 6 days, Book.io every 2 months. The most recent releases landed on September 13, 2026 and September 17, 2026 respectively.

## The numbers

| Metric | BookFolder | Book.io |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [4.7 (28 ratings)](https://appshunter.io/ios/app/bookfolder/id1561283025/reviews) | **[4.8 (58 ratings)](https://appshunter.io/ios/app/bookio/id1661003233/reviews)** |
| Number of ratings | 28 | **58** |
| Positive reviews | 88.2% of reviews | **96.7% of reviews** |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 6 days** | Every 2 months |
| Monetization | Free | Free |
| Size | 2 MB | 31 MB |
| Requires iOS | **14.0** | 16.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 12+ |
| Developer | [Molly Black](https://appshunter.io/developer/1561283027) | [Book.io, Inc](https://appshunter.io/developer/1661003235) |

## What reviewers say

### BookFolder

[App page](https://appshunter.io/ios/app/bookfolder/id1561283025)

Organize your PDF library with custom folders, cover images, and themes. Enjoy a personalized reading experience with features like split-screen multitasking and bookmarks. This free app offers a clean interface and essential reading tools.

**Highlights:** Custom folder organization, Custom cover images for PDFs, Split-screen multitasking on iPad, Multiple theme colors and icons, Dark Mode support, Bookmarks and table of contents

**In-app purchases:** none


### Book.io

[App page](https://appshunter.io/ios/app/bookio/id1661003233)

Manage your digital library of eBooks and audiobooks with a user-friendly interface. Customize your reading experience with various themes and text settings, and enjoy features like bookmarking and embedded media. Own and control your digital content.

**Highlights:** eBook and Audiobook management, Customizable themes and text settings, Seamless navigation and bookmarking, Audiobook playback and reading/listening switch, Embedded video and fixed format support, Social media login

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is BookFolder free?

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

### Is Book.io free?

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

### Which has better reviews, BookFolder or Book.io?

Book.io is rated higher. BookFolder averages 4.7 out of 5 from 28 ratings, while Book.io averages 4.8 from 58 ratings.

### Do BookFolder or Book.io have ads?

Neither BookFolder nor Book.io shows ads.

### Which is updated more often, BookFolder or Book.io?

BookFolder ships an update every 6 days, and Book.io every 2 months. Most recently, BookFolder was updated on September 13, 2026 and Book.io on September 17, 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.*