Thorium Reader vs MargiNotes
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Thorium Reader
Organize all your ebooks, comics, and manga in a single app. Customize your reading experience with adjustable text, fonts, and themes. Listen to audiobooks and zoom into visual content with ease.
- Unified bookshelf for all content
- Adjustable text size and spacing
- Multiple font options
- Text-to-speech audio playback
- Zoom for comics and manga
- Offline dictionary and translation
- Import EPUB, PDF, CBZ files
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Looking for an app where you can bring all your ebooks, comics and manga in one place? That’s what we built Thorium Reader for. Read it your way Everyone’s different, that’s why we want you to be fully in control: • Adjust text size, switch between color schemes with themes and control spacing. • 10+ fonts available, including specialized ones. • You prefer audio? Listen to any ebook, whenever you want. We’ll remember your preference. • Zoom into comics, manga and magazines. • Add bookmarks with notes. • Use the built-in iOS dictionary and translation features, even offline. • Tweak your reading experience with reading options. Bring your own books A single bookshelf and reading application where you can bring all your content: • Download free books, borrow from your library or buy from your favorite retailer. • Support for ebooks, documents, comics and manga. • Import EPUB, PDF and CBZ files. • Support for Readium LCP, used by thousands of libraries and retailers. Thorium Reader is built by EDRLab, a non-profit dedicated to open standards, reading and accessibility.
MargiNotes
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MargiNotes is a calm reader and note-taking app for PDF, EPUB, and paper books. Its difference is simple: a note can keep a path back to the book it came from. Import a highlight from Kindle or Apple Books, or capture a quote from a printed page. If the matching PDF or EPUB is in your library, MargiNotes can search that book on your device and relink the note to its real place. No guessed links. If MargiNotes cannot find a reliable match, it says so clearly. READ AND CAPTURE • Read PDF and EPUB books with adjustable themes, typography, layout, and reading settings. • Highlight while you read and keep each note with its book. • Capture quotes from printed books with on-device OCR. • Scan a barcode to fill in a paper book's title, author, and cover. • Add comments, tags, and voice notes alongside what you read. FIND YOUR WAY BACK Search inside a book and your own notes appear first, next to the book's own sentences. Search quotes, comments, tags, and transcripts across your whole library, or find a note straight from iPhone search. Ask your notes a question and the answer is built only from them — and always shown with the notes it came from. Writing the answer needs Apple Intelligence; without it, MargiNotes still finds the notes closest to your question. YOUR NOTES, PORTABLE Create shareable quote cards, follow your reading with simple statistics and widgets, and export to Markdown, PDF, or an Obsidian vault where every note keeps its links. PRIVATE BY DESIGN • No account • No ads • No analytics • No cloud AI — text recognition, transcription, and answers run on your device • Sync only through your own iCloud The app never goes online by itself. The one exception is the barcode lookup you start yourself, which sends only the ISBN — and you can switch it off. Your books stay yours. MargiNotes is built to help you remember not only what you saved, but where it came from.
Screenshots
Verdict
The clearest difference is iOS requirement: MargiNotes at 17.0 against Thorium Reader's 26.1. On price, update cadence, ads and in-app purchases there is nothing between them.
Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS
Both are free to download. Neither carries in-app purchases, so what you see is what you pay.
Thorium Reader ships an update every 3 weeks, MargiNotes every 2 weeks. The most recent releases landed on September 28, 2026 and October 10, 2026 respectively.
| Parameter | Thorium Reader | MargiNotes |
|---|---|---|
| Price | Free | Free |
| Rating | 3.6 (11 ratings) — better | — |
| Positive reviews | 37.5% of reviews | — |
| Number of ratings | 11 — better | — |
| Update frequency | Every 3 weeks | Every 2 weeks — better |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Free | — |
| Devices | iPhone, iPad | iPhone, iPad |
| Requires iOS | 26.1 | 17.0 — better |
| Further details — not scored | ||
| Size | 46 MB | 14 MB |
| Age rating | 17+ | 4+ |
| Developer | Readium | Emirhan Ayaz |
In-app purchases
Thorium Reader
No in-app purchases
MargiNotes
No in-app purchases
Questions
Is Thorium Reader free?
Is MargiNotes free?
Do Thorium Reader or MargiNotes have ads?
Which is updated more often, Thorium Reader or MargiNotes?
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