Comparison

Flumen vs Bookmook

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

Head to head
About

Flumen

Features
Read full description

Flumen is a calm, private EPUB reader for people who like building a real library full of ebooks. Import your own EPUBs, download public-domain classics from Project Gutenberg and Standard Ebooks, and keep everything organized in a library that feels made for reading. Covers, progress, metadata and collections all in one place, without ads or a social layer around your books. READ COMFORTABLY Choose from carefully tuned themes including Paper, Sepia, Night, and OLED Black. Adjust fonts and text size, then let Flumen remember your reading preferences for each book. The reader keeps the interface out of the way so the page can take the room it deserves. DISCOVER CLASSICS Search and browse public-domain books from trusted sources, preview book details, and download directly to your library. Explore authors, genres, popular classics, and curated rows without leaving the app. ORGANIZE YOUR LIBRARY Sort by recent, title, author, or progress. Create collections, use smart collections, rename books, track finished titles, and quickly return to what you were reading. READING PROGRESS THAT FEELS USEFUL Flumen tracks where you are, how much is left, and your active reading time. Optional goals, streaks, monthly summaries, and reading statistics help you understand your habits without turning reading into homework. PRIVATE BY DESIGN Your library, settings, and reading history are stored on your device by default. Flumen does not use third-party advertising or analytics SDKs to track your reading. FLUMEN PRO Flumen is free to start with a 15-book library. Flumen Pro is a one-time purchase that unlocks unlimited books, reading statistics, and private iCloud sync for your library, EPUB files, progress, settings, notes, and highlights across your Apple devices. Flumen is built for readers who want a quieter place for their books.

About

Bookmook

Features
Read full description

Bookmook is your private book tracker and eReader. Everything stays on your device: no account, no tracking, works offline. Built in Switzerland by an independent developer. โ€ข ADD BOOKS - Snap a photo of the cover to find the book online - Cover, blurb and year fill in automatically โ€ข TRACK YOUR BOOKS - Rate with thumbs up/down - Write your own review in a free-text field โ€ข READ WITHOUT SWITCHING APPS - Read your books in the built-in eReader (ePub) - Set your own background (light/sepia/dark) - Choose your font size and typeface - Add bookmarks - Save quotes with a single tap โ€ข CONNECT YOUR BOOKS - Link your books by your vibes - See the links as a constellation around a book - Share a constellation โ€” friends import it with one tap - Get automatic suggestions from your own library - No outside algorithm, no ads โ€ข ORGANIZE BY WHY - Sort by your own, freely expandable categories instead of rigid genres - Find books again by mood and theme โ€ข LISTS & TIMELINE - Add books to your TBR (to-be-read) list - Read, Abandoned, favorite authors, most-connected books โ€” all one tap away - Follow your reading history on the timeline โ€ข IMPORT & EXPORT - Import your library from Goodreads, StoryGraph, Calibre-Web (OPDS) or JSON - Export as Markdown/JSON - No lock-in โ€ข BACKUP & RESTORE - Make a full backup of your library anytime - Restore it 1:1 โ€” even on a different device - All local, no outside server and no account โ€ข BUILT FOR BIG LIBRARIES - Search, filters and your library stay fast โ€ข PRIVATE BY DESIGN - No sign-up, no forced cloud, no server, no data tracking - Your data is yours Free up to 5 books. Bookmook Premium unlocks unlimited books โ€” a one-time purchase, no subscription. โ€” Bookmook Premium is a one-time purchase (no subscription, no auto-renewal). Payment is charged to your Apple account. Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/

Screenshots

Flumen4 screens
Bookmook4 screens

Verdict

The call

Flumen and Bookmook are too close to call on the numbers: across 6 compared parameters โ€” price, update cadence, ads and in-app purchases among them โ€” neither pulls far enough ahead to decide it. What separates them is feature set and interface, not measurable difference.

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. Flumen sells 1 one-off in-app purchase and Bookmook sells 2 in-app purchases, starting at $2.99 per month. Whichever you choose, the download price is not the number that matters.

UpkeepUpdate frequency

Flumen ships an update every 2 weeks, Bookmook weekly. The most recent releases landed on October 5, 2026 and October 15, 2026 respectively.

ScorecardNo meaningful differences
Flumen versus Bookmook: the parameters behind the verdict, then further details
ParameterFlumenBookmook
PriceFreeFree
Update frequencyEvery 2 weeksWeekly โ€” better
AdsNoNo
In-app purchasesYesYes
DevicesiPhone, iPadiPhone, iPad
Requires iOS17.0 โ€” better18.0
Further details โ€” not scored
Size18 MB13 MB
Age rating12+4+
DeveloperMathias Jaeger-PedersenL. Weber

In-app purchases

1 purchases

Flumen

One-time1
  • Flumen Pro$6.99
2 purchases

Bookmook

Subscriptions2
  • Bookmook Premium โ€“ Monthly$2.991 Month
  • Bookmook Premium โ€“ Yearly$19.991 Year

Questions

Is Flumen free?
Flumen is free to download, with in-app purchases available.
Is Bookmook free?
Bookmook is free to download, with in-app purchases available.
Do Flumen or Bookmook have ads?
Neither Flumen nor Bookmook shows ads.
Which is updated more often, Flumen or Bookmook?
Flumen ships an update every 2 weeks, and Bookmook weekly. Most recently, Flumen was updated on October 5, 2026 and Bookmook on October 15, 2026.

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