Leaf & Spine vs Continuum
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Leaf & Spine
Enhance your reading experience with a distraction-free app that supports various formats like PDFs, EPUBs, audiobooks, and comics. Build daily reading habits with powerful tools, track your progress with detailed analytics, and personalize your digital library.
- Supports PDF, EPUB, CBR, CBZ, and Audiobooks
- Smart EPUB annotation and note-taking
- Text-to-Speech for audiobooks
- Customizable themes and 3D bookshelf
- Daily reading habit tracking and analytics
- Immersive focus sessions with ambient environments
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Your library, your shelf, your reading habit. Leaf & Spine is a calm, distraction-free home for your EPUBs, PDFs, comics and audiobooks. Arrange them on a 3D bookshelf, read with highlights, notes and drawings, listen with the screen off, and watch a daily reading habit take shape. Read for free, or upgrade to Premium for stats, focus sessions, backups and your own servers. BRING IN YOUR BOOKS • Read EPUB, PDF, CBZ and CBR, and listen to audiobooks. Audiobooks require Premium. • Add a whole folder at once, or pick files yourself. • Discover free public-domain books and audiobooks from Project Gutenberg, Standard Ebooks and LibriVox. • Connect your own server (Premium): Calibre, Calibre-Web, Kavita, Komga, Audiobookshelf, or a WebDAV folder such as Nextcloud or a NAS. Browse it, search it as you type, and download books to read offline. READ YOUR WAY • Highlight, take notes, draw with pen, pencil and highlighter, and look words up in the dictionary or translator. • Listen: the page is read aloud with the sentence lit up, using natural voices made on your device, and an EPUB that comes with a recording plays the narrator. • Focus mode for reading a sentence at a time, and a reading ruler. • Presets, typefaces (including Atkinson Hyperlegible and OpenDyslexic), heading styles and page-turn speed. Premium readers can import their own fonts. AUDIOBOOKS THAT KEEP PLAYING • Keep listening with your phone locked or while you use another app, with play, pause and skip on the lock screen. • Chapters, bookmarks, notes, speed and a sleep timer that works with the screen off. ORGANISE YOUR SHELF • A 3D bookshelf with categories, sub-categories, tags and series, sorted and grouped by author or series, with bookends you can fold into a box set. • Spines take their colour from each book's cover, or customise spines, patterns and covers yourself. • A page for every book: progress, the next in its series, description, chapters and your marks. • Fix a book's details, or fill them in from Open Library (Premium). • The Notebook gathers every highlight, note, drawing and looked-up word from your whole library, and one search covers it all. BUILD A HABIT • Goals in minutes a day or days a week, reminders at a time you choose, and streak freezes so one missed day doesn't erase months. • Home follows the series you are reading, and finishing a book offers the next one. • Home screen widgets with your current book and a highlight worth rereading. • Premium stats: time read and listened, pages, chapters, books finished, genres, highlights and words looked up, by week, month, year or all time. FOCUS SESSIONS (Premium) • Set a timer and read inside an immersive environment: a fireplace, a beach, a waterfall or a rainy window, each with its own ambience and music, which keep playing with the screen locked. YOUR PLACE, EVERYWHERE (Premium) • Back up automatically to iCloud or Google Drive, and keep your place across your devices. • Sync your progress with Audiobookshelf, Komga, Kavita and KOReader. PRIVATE BY DESIGN • No account or sign-up needed to start reading. • Your books, highlights, notes and progress stay on your device. Backups go to your own iCloud or Google Drive, never to our servers. • Six themes, light and dark (two free), and the app in English, French, German, Italian, Spanish and Portuguese. PERFECT FOR • Students who highlight, draw and track study time. • Fiction readers who want EPUBs and audiobooks in one place. • Comic and manga readers with CBZ and CBR collections. • Anyone with a Calibre, Kavita, Komga or Audiobookshelf library. CONTENT NOTICE Leaf & Spine does not sell or host books. Discover lists free public-domain titles from Project Gutenberg, Standard Ebooks and LibriVox; everything else is your own files and your own servers. Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/
Continuum
Immerse yourself in reading and listening simultaneously with this app. It syncs your ePub text with audiobooks, tracks your progress across both formats, and even allows you to scan physical book pages to find the corresponding digital location.
- Simultaneous ePub reading and audiobook listening
- Automatic progress tracking across formats
- Scan physical pages to find ePub location
- Chapter sync wizard for manual adjustments
- Customizable ePub reader
- Variable speed audio player
- Library management with stats
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Your ebook and your audiobook, synced on their own. Import both and Continuum matches the chapters for you. The text highlights along with the narration and the page turns itself. Your own files. One purchase, no subscription. Read, listen, or do both at once in Immersive mode. On iPhone and iPad. Some books are hard to put down. A chapter on the sofa. Another on the way. Or a quiet moment following the words as you listen to the narration. Listening is reading, too: you choose how to step into the story. IMMERSIVE, AUTOMATIC With chaptered EPUBs and audiobooks, Continuum links the chapters by itself, so you no longer have to match them one by one. Highlighting follows the narration word by word, and automatic page turns keep the passage in view. Choose the highlight color or turn it off. You can review and adjust any chapter link. YOUR BOOKS, NOBODY ELSE'S Import from Files or from a compatible Calibre library. Browse as a shelf or a list, and organize by title, author, and series. Read and listen offline when the files are on your device. MAKE EVERY PAGE YOUR OWN Adjust font, size, line spacing, margins, and background. Import your own TTF or OTF fonts. Highlight phrases or paragraphs, pick a color, and add notes. Revisit your annotations and bookmarks, search inside the book, or move through its chapters. Scan a page of your print copy to find that passage in the EPUB. FULL-FEATURED AUDIO Play M4B, MP3, and M4A. Adjust speed, set a sleep timer, and navigate by chapter. Background playback, Lock Screen controls, and CarPlay. ON IPHONE AND IPAD iCloud syncs your library, progress, bookmarks, annotations, and chapter links. Store imported EPUB and audio files in iCloud Drive and recover them on your other device. External audio folders are connected on each device. Imported fonts stay on the device where you add them. YOUR READING RHYTHM Weekly, monthly, and yearly activity, a calendar, streaks, and time per book. Reading, listening, and Immersive are counted separately, with the share of each. A SPACE FOR YOUR BOOKS A refreshed interface, revised dark mode, and portrait and landscape layouts. ONE PURCHASE, NO SUBSCRIPTION Unlock Immersive, reading, and listening with a single in-app purchase. No recurring fees. Restore your purchase with your Apple Account. WHAT IMMERSIVE NEEDS Matching EPUB and audiobook editions, both with chapters. Initial preparation downloads a model and takes a few minutes the first time. Continuous audio without chapter markers does not align reliably. * Books are not included. You bring your own legally obtained, DRM-free EPUBs and audiobooks. Continuum does not sell books or offer a catalog or service for obtaining them. It does not open DRM-protected files or remove DRM. The purchase unlocks app features only. Books shown in the screenshots are in the public domain. Terms of Use: https://continuumreader.app/terms.html Privacy: https://continuumreader.app/privacy.html
Screenshots
Verdict
The clearest difference is rating: Leaf & Spine at 4.4 against Continuum's 3.0. Leaf & Spine also leads on review sentiment (55% vs 40%) and iOS requirement (15.5 vs 17.0). Continuum's advantage is monetization model (free vs freemium). On price, ratings volume, update cadence and ads 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. Leaf & Spine sells 10 in-app purchases, starting at $0.99 per month and Continuum sells 1 one-off in-app purchase. Whichever you choose, the download price is not the number that matters.
Leaf & Spine holds the better App Store score, 4.4 against 3.0. Both are backed by a comparable volume of ratings — 8 and 4 respectively. Written reviews point the same way: 55% of Leaf & Spine's written reviews are positive against 40% of Continuum's.
Leaf & Spine ships an update every 2 weeks, Continuum every 9 days. The most recent releases landed on October 31, 2026 and November 6, 2026 respectively.
| Parameter | Leaf & Spine | Continuum |
|---|---|---|
| Price | Free | Free |
| Rating | 4.4 (8 ratings) — better | 3.0 (4 ratings) |
| Positive reviews | 54.5% of reviews — better | 40.0% of reviews |
| Number of ratings | 8 — better | 4 |
| Update frequency | Every 2 weeks | Every 9 days — better |
| Ads | No | No |
| In-app purchases | Yes | Yes |
| Monetization | Freemium | Free — better |
| Devices | iPhone, iPad, iPod — better | iPhone, iPad |
| Requires iOS | 15.5 — better | 17.0 |
| Further details — not scored | ||
| Size | 119 MB | 31 MB |
| Age rating | 4+ | 4+ |
| Developer | Aqeeb Rizwan | RJ DIGITAL HUB SLU |
Customer experience
Leaf & Spine
Continuum
In-app purchases
Leaf & Spine
- Premium Monthly7 Days trial$0.991 Month
- Premium Yearly7 Days trial$9.991 Year
- Teal Stripes$0.79
- Teal Hearts$0.99
- Teal Duotone$0.99
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- Teal Diamonds$1.49
- Teal Stars$1.49
- Teal Leaves$1.49
- Teal Spiral$1.99
- Premium Unlock$14.99
Continuum
- Continuum$9.99









