Comparison

FinnBook eBook reader vs Duo Reader

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

Head to head
About

FinnBook eBook reader

Features
Read full description

FinnBook is an ebook reader for iPhone and iPad that handles the books you already have and shows you what you've read. Free, forever โ€ข Read EPUB and DRM-free Kindle books (MOBI and AZW3) โ€ข Browse and download from your Calibre server, or from the free Project Gutenberg library โ€ข Light, Dark, Sepia and Dusk themes, with your choice of font, text size, line height and margins โ€ข Bookmarks, search and a table of contents FinnBook Pro (optional subscription) FinnBook Pro is an auto-renewing subscription, available monthly ($1.99) or yearly ($19.99, with a one-week free trial). It adds: โ€ข Reading statistics that measure the time you spend reading, not the time a book sits open: daily goals, streaks, a year of reading in one chart, and which books took the hours โ€ข Custom reading themes โ€ข FinnBook Cloud: sign in with Apple to sync your books, reading progress, bookmarks, themes and stats between your iPhone and iPad โ€ข Update a book's cover and details from Hardcover Payment is charged to your Apple ID at confirmation. The subscription renews automatically unless you cancel at least 24 hours before the end of the current period. You can manage or cancel it in your App Store account settings. Terms of Use: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/ Privacy Policy: https://finnbook.app/privacy

About

Duo Reader

Features
Read full description

Duo Reader is a quiet place to read. Your books, PDFs and articles live in one calm library, set in beautiful type, with a reading companion for when a page needs a second look. READ IN COMFORT - Typography first: choose your typeface, size, spacing and margins, and every line reflows instantly - Clean, distraction-free pages that let the words lead - Pick up exactly where you left off, every time YOUR LIBRARY, QUIETLY ORGANIZED - Books, PDFs and RSS articles in one place - Folders for studying, classics, or whatever you're reading next - Search across your books and jump straight to the passage UNDERSTAND WHAT YOU READ - Select any passage to explain, define, highlight or add a note - Translate a passage and read it alongside the original - Ask Mochi, your reading companion, to summarize a chapter without leaving the page LISTEN WHEN YOUR EYES NEED A REST - Natural voices in several languages, with adjustable speed - Follow along as each sentence is highlighted EVERYTHING YOU SAVE, IN ONE PLACE Bookmarks, notes and highlights, gathered and easy to revisit. EVEN BETTER ON IPHONE DUO Unfold iPhone Duo and your page opens into a true two-page spread. Translations, Mochi and your notes sit beside the page instead of on top of it. Fold it again mid-chapter, or mid-sentence while listening, and you're still on the same line. PRIVATE BY DESIGN Mochi answers quick questions on device, so your reading stays on your iPhone. Mochi features require a device that supports Apple Intelligence. --------------------- Privacy Policy: https://leostudio.global/policies Terms of Use: https://leostudio.global/policies For technical assistance or other inquiries: support@leostudio.global

Screenshots

FinnBook eBook reader4 screens
Duo Reader4 screens

Verdict

The call

The clearest difference is in-app purchases: Duo Reader at none against FinnBook eBook reader's 2. Duo Reader also leads on iOS requirement (17.6 vs 26.0). FinnBook eBook reader's advantage is ads (none vs shown). On price, update cadence and device support 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. FinnBook eBook reader sells 2 in-app purchases, starting at $1.99 per month. Duo Reader asks for nothing beyond the download.

UpkeepUpdate frequency

FinnBook eBook reader ships an update every 3 days, Duo Reader every 6 days. The most recent releases landed on October 14, 2026 and October 23, 2026 respectively.

Scorecard3 real differences ยท 3 level
FinnBook eBook reader versus Duo Reader: the parameters behind the verdict, then further details
ParameterFinnBook eBook readerDuo Reader
PriceFreeFree
Update frequencyEvery 3 days โ€” betterEvery 6 days
AdsNo โ€” betterYes
In-app purchasesYesNo โ€” better
DevicesiPhone, iPadiPhone, iPad
Requires iOS26.017.6 โ€” better
Further details โ€” not scored
Size21 MB95 MB
Age rating4+4+
DeveloperMaziar RezvaniLeoStudio Global

In-app purchases

2 purchases

FinnBook eBook reader

Subscriptions2
  • FinnBook Pro$1.991 Month
  • FinnBook Pro7 Days trial$19.991 Year
None

Duo Reader

No in-app purchases

Questions

Is FinnBook eBook reader free?
FinnBook eBook reader is free to download, with in-app purchases available.
Is Duo Reader free?
Duo Reader is free to download, with no in-app purchases.
Do FinnBook eBook reader or Duo Reader have ads?
Duo Reader shows ads; FinnBook eBook reader does not.
Which is updated more often, FinnBook eBook reader or Duo Reader?
FinnBook eBook reader ships an update every 3 days, and Duo Reader every 6 days. Most recently, FinnBook eBook reader was updated on October 14, 2026 and Duo Reader on October 23, 2026.

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