Spine vs Leaf

Spine is the audiobook app you'll actually leave open. It streams from your own cloud library, syncs with Hardcover, and turns the habit of listening into something worth coming back to with listener levels, daily streaks, and a year-in-review Recap bright enough to share. Built native for iOS 26, with Liquid Glass, serif typography, and a player carved into the book's detail page. No subscription. No ads. No in-app purchases. No account to create with us. Bring your own library, keep your own data. WHAT MAKES IT DIFFERENT • ONE PAGE FOR THE BOOK: No separate Now Playing screen. Cover, scrubber, transport, speed, sleep timer, chapters, and bookmarks all live inline on the detail page, on an ambient backdrop tinted by the cover. • CHAPTERS THAT JUST WORK: Single-file M4B audiobooks expose their chapters automatically. Cloud folders with multiple M4Bs split into separate library entries. No manual editing, no reprocessing. • HARDCOVER SYNC: Just listen. Spine logs progress and finished books to Hardcover, pulls cover art, genre, and structured series data, and keeps your shelves in sync. • ON-DEVICE INTELLIGENCE: Open the next book in a tracked series and Spine writes a two-sentence "previously on…" recap from what you've already finished. It also rewrites bloated marketing descriptions into a calm summary, captions your Recap, and cleans up filename-salad titles. All on Apple's on-device foundation model. Nothing about your library leaves the phone. • LEVELS, STREAKS, AND GOALS: Lifetime hours unlock six tiers, from Sapling to Oracle. A unified daily/yearly goal card, a streak chip, and a year-spanning heatmap show the shape of your habit at a glance. • A RECAP YOU'LL WANT TO SHARE: Five bright screens covering hours, finished books, top author and genre, monthly rhythm, and the books you marked Read on Hardcover. One tap stitches the whole thing into a postable image. • PLAYBACK THAT PAYS ATTENTION: Step away for a moment and Spine rewinds a few seconds when you press play. The sleep timer fades audio gently to zero. Finish a series entry and the next book surfaces automatically. • LIVE ON THE LOCK SCREEN: Live Activities follow the current book onto the Lock Screen and Dynamic Island, with a tappable Play/Pause. The home-screen widget mirrors the same control on a cover-tinted backdrop, toggle playback in one tap, even when Spine isn't running. • BOOKMARKS WORTH KEEPING: Tap to mark any moment with a written note. Tap to jump back later. • SEARCH THAT POINTS SOMEWHERE: Open the search tab cold and you get a trending-genre card tuned to what you actually listen to, a Discover list of Audible new releases, and trending shortcuts. Most people aren't searching their own shelf, they're looking for the next thing. • EVERY BOOK IS A DOORWAY: Detail pages carry "More by author", "Top in genre", and a "Part of {Series}" rail that interleaves the books you own with the Hardcover siblings you don't, in reading order, right under your bookmarks. • CLOUD LIBRARY, REPAIRED IN ONE TAP: When a cloud title expires or goes stale, Spine flags it on the detail page and offers a one-tap re-download. No re-adding, no losing your progress. • SPOTLIGHT-INDEXED: Search your library from anywhere in iOS. PRIVACY BY DEFAULT Spine has no servers, no analytics, and no third-party SDKs. API keys live in the iOS Keychain. Your library, listening history, and bookmarks stay on your device (and sync via your own iCloud, if you enable it). The on-device AI features run on Apple Intelligence — your books never leave the phone. REQUIREMENTS • iPhone running iOS 26. • A cloud audiobook library. • A free Hardcover account is recommended for metadata, search, and read sync. • Apple Intelligence-eligible device is required for the optional AI features (everything else works without it).

Give your books a home of their own. Leaf brings beautiful EPUB reading and thoughtful library management together on iPhone and iPad. Import the DRM-free books you already own, organize them your way, and keep everything in sync with iCloud. READ YOUR WAY Make every book comfortable to read. Choose from carefully selected fonts—including accessibility-friendly options—and fine-tune the font size, line height, margins, letter spacing, word spacing, and alignment. Choose from a collection of color themes, follow your device’s appearance automatically, or give individual books their own settings. A configurable reader footer can show page count, percentage, chapter progress, chapter title, or book title. A LIBRARY THAT FEELS LIKE YOURS Create custom shelves and let Smart Shelves automatically gather books that are In Progress, Unread, Completed, Did Not Finish, or downloaded to your device. Browse by author, series, and genre; search and sort your collection; and edit titles, authors, covers, descriptions, publication details, and more. Rate books, mark the ones you loved, and write down your thoughts when you finish. Leaf remembers reading time, completion dates, and the books you have finished this year—then helps you choose what comes next. PICK UP WHERE YOU LEFT OFF Optional iCloud sync keeps your books, library details, settings, and reading progress available across your iPhone and iPad. No separate Leaf account is required. Download books for offline reading, remove local copies when you need space, and return to your current book from the Home Screen widget. FIND YOUR NEXT BOOK Connect to a self-hosted Grimmory library, browse Project Gutenberg through the built-in Source, add other compatible OPDS sources, or import EPUB files from Files. Leaf also includes a small collection of beautifully produced public-domain classics, so you can begin reading immediately. For readers who also use KOReader on e-ink devices, Leaf can sync reading progress with a compatible KOReader sync server. BUILT FOR IPHONE AND IPAD Leaf is designed for every screen it runs on: a focused reading experience on iPhone and a spacious library on iPad. Your books feel at home wherever you read. Leaf currently supports DRM-free EPUB books. TERMS OF USE https://www.apple.com/legal/internet-services/itunes/dev/stdeula/