scrolly vs ZooBook
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
scrolly
Transform your PDF reading with a delightful experience. Customize text size and themes, save your progress with bookmarks, and enjoy a unique vertical scrolling mode. Perfect for books, papers, articles, and textbooks.
- Customizable text size
- Theme selection
- Bookmark saving
- Vertical snap-to-scroll
- Read books, papers, articles, textbooks
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replace your scrolling addiction with reading! this app displays PDFs in a beautiful reading experience where you can change the text size, choose a theme, and save bookmarks scroll through your book with a vertical snap-to-scroll use it to read books, scientific papers, articles, and textbooks easily!
ZooBook
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ZooBook is your own little library, filled with the books you've read. Every time you add a book, your shelf fills up as delightfully as a zoo. [Key Features] - A shelf you fill with covers Scan an ISBN barcode or search by title or author, and the real book cover lands on your shelf. - Drag covers to reorder Press and hold a cover, then drag it one spot at a time to exactly where you want it. Sort books into shelves like "Fiction," "Study," and "Essays," and rearrange them freely. - Reading records and habits Track pages read, time spent reading, star ratings, and status (Owned · Reading · Finished), and review it all at a glance with statistics and a calendar. - Quote collection Photograph a passage with your camera, and ZooBook recognizes it as text and gathers it into your personal quote collection. - Sticky-note memos Jot down the thoughts that come to you for each book. - Home Screen widgets Check the book you're reading, your shelf covers, reading statistics, and recently added books right from widgets. - Atmospheric themes Choose a bookshelf theme you love, such as Warm Oak, Walnut Study, Sage Gallery, and Lavender Atelier. - Safe backup and restore Back up your entire library to iCloud Drive and Files, and restore it anytime. - Export Export your library to Google Sheets or publish it as a web shelf. ZooBook supports both English and Korean, and you can switch languages right inside the app. Whether paper books or e-books, gather the books you've read one by one and build a library that's truly your own.
Screenshots
Verdict
The clearest difference is update cadence: ZooBook at daily against scrolly's weekly. scrolly's advantage is iOS requirement (17.0 vs 26.5). On price, ads, in-app purchases and device support 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. Neither carries in-app purchases, so what you see is what you pay.
scrolly ships an update weekly, ZooBook daily. Both last shipped on October 4, 2026.
| Parameter | scrolly | ZooBook |
|---|---|---|
| Price | Free | Free |
| Rating | 5.0 (9 ratings) — better | — |
| Positive reviews | 85.7% of reviews | — |
| Number of ratings | 9 — better | — |
| Update frequency | Weekly | Daily — better |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Free | — |
| Devices | iPhone, iPad | iPhone, iPad |
| Requires iOS | 17.0 — better | 26.5 |
| Further details — not scored | ||
| Size | 9 MB | 11 MB |
| Age rating | 4+ | 4+ |
| Developer | totally important LLC | Sangwook Joo |
In-app purchases
scrolly
No in-app purchases
ZooBook
No in-app purchases






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