KO Reader vs Local Narrator

KO Reader turns web articles, ebooks, and PDFs into natural-sounding speech — entirely on your device. No cloud, no tracking, no subscriptions. Paste a URL or open an EPUB or PDF, and KO Reader reads it aloud with a neural AI voice. Everything runs locally, so your reading stays private and works anywhere — on the train, on a plane, or off-grid. Export your favorite articles or books to m4a or m4b files. WHAT YOU CAN READ • Web articles — Wikipedia, news sites, blogs, and Substack • Fanfiction — Archive of Our Own, Royal Road, and Wattpad, with chapter detection • EPUB ebooks with full chapter navigation • PDF documents • Plain text — paste or type any content • Safari Share Extension — send articles to KO Reader with one tap NATURAL AI VOICES • 53 neural voices across 9 languages: American and British English, Spanish, French, Italian, Portuguese, Japanese, Mandarin, and Hindi • Preview any voice before selecting it • Mark favorites for quick access • Playback speed from 0.5x to 2.0x • Smart heteronym resolution — the voice knows the difference between "lead" (the metal) and "lead" (to guide), "wound" (injury) and "wound" (past of wind) • Custom pronunciation dictionary — teach the reader how to say names, jargon, or anything you like READ YOUR WAY • Reading queue — line up multiple articles and auto-advance • Bookmarks — save passages to come back to • Reading history — pick up where you left off, across books and articles • Chapter pre-generation — book chapters start instantly, no waiting between them • Audio export — save generated audio for offline listening • Adjustable article font (system, serif, monospaced, rounded) and Dynamic Type support BUILT FOR ACCESSIBILITY • Full VoiceOver support with labeled controls throughout • Haptic feedback on transport controls and sleep timer • Background audio — listen while you use other apps or with the screen off • Sleep timer — stops playback when you drift off • Works with AirPods, Bluetooth speakers, and CarPlay RUNS EVERYWHERE • Universal app for iPhone, iPad, and Mac • macOS keyboard shortcuts (Space to play/pause, Cmd+← and Cmd+→ to skip) • Optimized for Apple Silicon with optional CoreML acceleration • Adjustable CPU thread count for performance tuning PRIVACY FIRST • 100% on-device TTS — your content never leaves your phone • No accounts, no analytics, no tracking, no ads • No internet required after the one-time model download • Reading progress stored locally only KO Reader downloads a ~350 MB neural voice model on first launch. After that, everything works fully offline. Powered by the open-source Kokoro TTS model (Apache 2.0).

Your books, read aloud — privately, on your iPhone. Local Narrator turns any EPUB or text-based PDF in your library into a real audiobook, narrated by a warm neural voice that runs entirely on the Apple Neural Engine. Nothing leaves your device. There is no cloud. There is no account. There is nothing to opt out of. — BRING YOUR OWN BOOKS — Drop in EPUB or PDF files from the Files app, the share sheet, or AirDrop. Your books stay on your iPhone, and the audio they become stays there too. No upload, no forced sync, no backup you didn't ask for. — A REAL NEURAL NARRATOR — Local Narrator runs Kokoro-82M, a state-of-the-art on-device text-to-speech model, on the Apple Neural Engine. The voices are warm, natural, and quietly expressive. When you'd rather not download the model, Apple's built-in system voices work for free. — BILINGUAL, AND SMART ABOUT IT — English and Spanish. Local Narrator detects each book's language and picks a voice trained for it. Spanish voices are still in beta stage. — LIKE AN AUDIOBOOK SHOULD BE — • Background playback that doesn't stop when the screen sleeps • Lock-screen controls — play, pause, +30, −15, scrub • Home and Lock-screen widget with a clean amber progress ring • Sleep timer for reading yourself to sleep • Per-book reading position, automatically saved • Unlimited bookmarks • Adjustable speed from 0.5× to 3.0× • Light parchment or dark charcoal reading themes • Full Dynamic Type and VoiceOver support — PRIVATE BY DESIGN — No accounts. No telemetry. No advertising SDKs. No third-party trackers. The only network call the app ever makes is the optional, one-time download of the Kokoro voice model. After that, everything works in airplane mode. — ONE PURCHASE. YOURS FOREVER. — Free to download and try with one book and Apple's system voices. A single $4.99 in-app purchase ("Local Narrator Full Access") unlocks unlimited books, all neural voices, the full speed range, the widget, the sleep timer, and unlimited bookmarks. No subscription. Family Sharing supported. — BUILT FOR REAL iPhones — iOS 17 and newer. iPhone 15 or later (Pro version recommended), optimised for the Apple Neural Engine. A small, careful app for people who still read.