Comparison

Ook for Books vs ShelfMark

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

Head to head
About

Ook for Books

Features
Read full description

Book sharing app for friends and communities. Easily scan and add your books to your library which others can view and request to borrow them. Look for books in Ook.

About

ShelfMark

Features
Read full description

A quiet reading tracker for people who love books more than apps. ShelfMark keeps your reading life in one calm, paper-warm place. Log the page you are on, keep a streak alive, and save the lines worth keeping. No account, no feed, no noise. MADE FOR READERS - Three shelves: to be read, reading, and finished. Move a book with a tap. - Quick page updates with percent complete, pages a day, and time left at your current pace. - A daily page goal beside your grace-day reading streak. - Search your library, filter by genre, and sort by recency, title, author, or progress. - A quote wall with the book, page number, and an optional photo of the page. - A yearly reading goal and Wrapped view with pages, streaks, genres, fastest reads, and monthly activity. - A private Home and Lock Screen widget for your current book, pages today, goal, and streak. - A complete local backup, additive restore, and Delete All My Data control. FREE AND LIFETIME ShelfMark is free for up to 3 books and 5 saved quotes. Reading progress, streaks, daily and yearly goals, search, backup, restore, deletion, and the widget stay useful without paying. A single Lifetime purchase unlocks unlimited books and quotes, the 30-day Reading Pulse, finish-date pace plans, full Wrapped statistics, and the one-page Reading Year PDF. It is a one-time purchase, not a subscription. Existing records always remain readable and editable. PRIVATE BY DESIGN Your reading library stays locally on your iPhone or iPad. No account, no analytics, and no tracking. Widget content uses Apple's private on-device App Group storage and is marked privacy sensitive.

Screenshots

Ook for Books4 screens
ShelfMark4 screens

Verdict

The call

The clearest difference is in-app purchases: Ook for Books at none against ShelfMark's 1. Ook for Books also leads on update cadence (every 3 days vs weekly). On price, ads, device support and iOS requirement there is nothing between them.

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

CostPrice ยท In-app purchases ยท Ads ยท Monetization

Both are free to download. ShelfMark sells 1 one-off in-app purchase. Ook for Books asks for nothing beyond the download.

UpkeepUpdate frequency

Ook for Books ships an update every 3 days, ShelfMark weekly. Both last shipped on October 31, 2026.

Scorecard2 real differences ยท 4 level
Ook for Books versus ShelfMark: the parameters behind the verdict, then further details
ParameterOok for BooksShelfMark
PriceFreeFree
Update frequencyEvery 3 days โ€” betterWeekly
AdsNoNo
In-app purchasesNo โ€” betterYes
DevicesiPhone, iPadiPhone, iPad
Requires iOS17.0 โ€” better18.0
Further details โ€” not scored
Size8 MB6 MB
Age rating12+4+
DeveloperJung Suk HahnInnovaLabWorks

In-app purchases

None

Ook for Books

No in-app purchases

1 purchases

ShelfMark

One-time1
  • ShelfMark Lifetime$49.99

Questions

Is Ook for Books free?
Ook for Books is free to download, with no in-app purchases.
Is ShelfMark free?
ShelfMark is free to download, with in-app purchases available.
Do Ook for Books or ShelfMark have ads?
Neither Ook for Books nor ShelfMark shows ads.
Which is updated more often, Ook for Books or ShelfMark?
Ook for Books ships an update every 3 days, and ShelfMark weekly. Most recently, Ook for Books was updated on October 31, 2026 and ShelfMark on October 31, 2026.

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