Comparison

BookFolder vs Book.io

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

BookFolder

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
Read full description

Organize your PDFs, set custom covers, and choose from several theme colors and icons, for a pleasant reading experience just the way you want it. • Create folders and folder groups to keep your PDFs organized however you prefer. Rename and rearrange things as the mood takes you. Name every single book and folder the same thing, if you really want to! (I don’t recommend doing that, but nonetheless, that’s the sort of awesome power that you wield if you use BookFolder.) • Set custom cover images for every book (or stick with a book’s default cover, of course). Your library will look the way that you want it to! (And the underlying files remain pristine, so if you begin to regret choosing a photo of your cat for every book in your collection, you can always restore the originals and no one will know. Except your cat, who is judging you now.) • Get wild on an iPad with split-screen multitasking support. Read two books at once (or the same book twice)! If that’s something that you want to do. • Swap between five theme colors, for an interface that works best for you. (Dark Mode support, too, of course!) • Choose from a dozen icons, from solid colors to subdued platinum to a retro rainbow look, to fit your mood and to ensure a harmonious home screen layout with your other apps. (I’m not the only one who arranges my icons by color and design… am I?) • You can use it to actually read the PDFs, too, of course. Mustn’t forget that part. • Plus bookmarks, searching, and table-of-contents support, as one would expect. • Also, it’s free, no in-app purchases, no tracking… just a nice PDF reader and library manager. I hope that you’ll enjoy it!

About

Book.io

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
Read full description

Book.io is the eBook and Audiobook app that empowers you to manage your digital library on your terms. Transform your reading experience with a range of features crafted for maximum enjoyment. Key Features: 1. Effortless Reading: Navigate your eBooks seamlessly with our user-friendly interface. 2. Customizable Themes: Personalize your reading environment with Light, Paper, or Dark themes. 3. Tailored Text Settings: Adjust text size, line spacing, and fonts, including options like Open Dyslexic. 4. Bookmarking and Navigation: Easily bookmark pages and navigate through your reading material. 5. Media Support: Immerse yourself with audiobooks, embedded videos, and fixed format support. 6. Dark Mode: Read comfortably in low-light settings with our sleek dark mode. 7. Multi-Language Support: Experience Book.io in Spanish or English for a tailored touch. Why Choose Book.io? Embrace the future while preserving the past with our collection of Unchangeable, Unburnable, Unbannable eBooks and Audiobooks you own and control. Join our community of satisfied readers today. Download Book.io and embark on your journey of actual digital ownership. What’s New: - Audiobook Support: Dive deeper into your favorite stories with our new audiobook feature. Switch between reading and listening anytime, anywhere. - Social Media Connection: Book.io is now easier than ever to get started. Log in or create an account using your existing social media credentials.

Screenshots

BookFolder4 screens
Book.io4 screens

Verdict

The call

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.

Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS

CostPrice · In-app purchases · Ads · Monetization

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

ReceptionRating · Positive reviews · Number of ratings

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.

UpkeepUpdate frequency

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.

Scorecard3 real differences · 7 level
BookFolder versus Book.io: the parameters behind the verdict, then further details
ParameterBookFolderBook.io
PriceFreeFree
Rating4.7 (28 ratings)4.8 (58 ratings) — better
Positive reviews88.2% of reviews96.7% of reviews — better
Number of ratings2858 — better
Update frequencyEvery 6 days — betterEvery 2 months
AdsNoNo
In-app purchasesNoNo
MonetizationFreeFree
DevicesiPhone, iPad, iPod — betteriPhone, iPad
Requires iOS14.0 — better16.0
Further details — not scored
Size2 MB31 MB
Age rating4+12+
DeveloperMolly BlackBook.io, Inc

Customer experience

BookFolder

All ratings28 ratings
Positive92.9%
Neutral3.6%
Negative3.6%
Written reviews17 reviews
Positive88.2%
Neutral5.9%
Negative5.9%

Book.io

All ratings58 ratings
Positive96.6%
Neutral0.0%
Negative3.4%
Written reviews30 reviews
Positive96.7%
Neutral0.0%
Negative3.3%

In-app purchases

None

BookFolder

No in-app purchases

None

Book.io

No in-app purchases

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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