What has The Shelf Desk measured?
Original datasets from our desk and our sibling sites, each built from primary sources (store listings, official pricing and help pages) with every cell sourced and dated. This site summarises each study for reader types and links to the full version.
GUIDE CARD 06: RESEARCH
RE-01
Which reading app helps you pick a book back up? It depends on how you read
A summary, for reader types, of our study of recap and spoiler-safety features in 30 reading apps.
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RE-02
Which reading tracker pricing model fits your reading habit?
A summary, for this site's readers, of the Reading app price index, Q4 2026. Prices re-read on 4 November 2026 on the US App Store and official pages, before tax.
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How we use studies on this site
We do not rank apps here, and the studies do not either. A study counts what apps publish. Where a count touches one of our nine library cards, the card keeps its own source and date.
Featured
Magic Bookmark
by Yomu
A spoiler-free reading companion: snap your page, and the recap, cast list and answers stop exactly where you are.
- Works with your own print book, ebook or audiobook, including library loans
- First book free, then $1.40 to $4.99 per book, no subscription
- iPhone; Android is on the roadmap
