BookThoughts vs Flumen
Price, ratings, monetisation and update history for both apps, side by side โ with what reviewers say about each.
BookThoughts
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An easy-to-use ebook reader that supports popular file formats such as "epub," "mobi," "azw3," and "txt." Enjoy features like marking specific text portions and adding notes. Customize the font size of your books , translate text using openAI . Best of all, all these features are completely free.
Flumen
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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.
Screenshots
Verdict
The clearest difference is in-app purchases: BookThoughts at none against Flumen's 1. BookThoughts also leads on iOS requirement (13.4 vs 17.0). Flumen's advantage is update cadence (every 2 weeks vs every 6 weeks). On price, ads 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
Both are free to download. Flumen sells 1 one-off in-app purchase. BookThoughts asks for nothing beyond the download.
BookThoughts ships an update every 6 weeks, Flumen every 2 weeks. The most recent releases landed on September 15, 2026 and September 18, 2026 respectively.
| Parameter | BookThoughts | Flumen |
|---|---|---|
| Price | Free | Free |
| Update frequency | Every 6 weeks | Every 2 weeks โ better |
| Ads | No | No |
| In-app purchases | No โ better | Yes |
| Devices | iPhone, iPad, iPod โ better | iPhone, iPad |
| Requires iOS | 13.4 โ better | 17.0 |
| Further details โ not scored | ||
| Size | 46 MB | 18 MB |
| Age rating | 4+ | 12+ |
| Developer | ๅฉท้ ๆ | Mathias Jaeger-Pedersen |
In-app purchases
BookThoughts
No in-app purchases
Flumen
- Flumen Pro$6.99
