KO Reader vs Yomite Voice
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
KO Reader
This app transforms web articles, ebooks, and PDFs into natural-sounding speech using on-device AI. Enjoy private, offline listening with customizable voices and playback speeds. Export audio for later or read anywhere without an internet connection.
- On-device text-to-speech
- Supports web articles, EPUB, PDF, and plain text
- 53 neural voices in 9 languages
- Customizable playback speed
- Audio export to m4a/m4b
- Offline functionality
- Privacy-focused, no tracking
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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).
Yomite Voice
This app transforms your favorite novels into audiobooks using AI-powered character voices. Enjoy offline, ad-free listening with customizable narration and import options from various sources. It prioritizes user privacy with on-device processing.
- 31 anime-style character voices
- One-tap import from web novels and EPUB
- 100% on-device inference for privacy
- Cast mode for distinct character voices
- Vertical reader with ruby support
- Sleep timer with end-of-chapter mode
- Per-novel pronunciation dictionary
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* Yomite is not affiliated with or endorsed by any third-party platform, publisher or author. Please respect each site's terms of service and only import content you have the right to read. Yomite is a privacy-first reader that turns novels, ebooks, comics and web pages into read-aloud audio — in your own language, or someone else's. Version 2.0 is a complete reading platform: import a book once, and read it, listen to it, or use it to learn a new language. What's new in 2.0 - A full book reader: EPUB, PDF, MOBI, FB2, RTF and comics/manga (CBZ), alongside plain-text novels and web-novel imports - 315+ Japanese voices, plus dedicated on-device AI voices in English, Vietnamese, Chinese, Korean, Spanish, French, Italian and Portuguese — and Apple's built-in system voices for dozens more languages on top - Learning Mode: shadow along with A-B loop and slow playback, tap any word for an instant lookup, and read with live on-device translation — including translating comic/manga panels in place - Web Reader: paste a URL and Yomite reads the page aloud, no import step needed - A true vertical-script (tategaki) reader with full ruby/furigana support - Year in Review: a personal listening-and-reading recap What it is - One-tap import from EPUB, PDF, MOBI, FB2, RTF, CBZ/manga, web novels and web articles - On-device inference for reading your book content — no uploads of your library - A free tier that's genuinely usable, with an optional Premium tier for unlimited listening Key features - Cast mode: assign distinct voices to the narrator and each character - Vertical reader (tategaki) with full ruby and emphasis-dot support - Sleep timer with end-of-chapter mode so playback never cuts mid-sentence - Per-novel pronunciation dictionary to fix proper-noun misreadings forever - Automatic ruby capture — annotations like 黒猫《くろねこ》 are learned on the fly - Bookmarks with notes, full-text search and a Year-in-Review dashboard - Lock-screen controls, Live Activity, Home-screen widgets and App Intents - Works with popular web novel sites and general web articles - iCloud sync for your library, bookmarks, dictionaries and reading position - Share extension to send text from any app straight into your library - Sound effects (page turn, end-of-reading chime) — toggle on or off Pricing The free tier includes up to 20 minutes of listening per day. All current on-device and Apple system voices are, and always will be, free to use. Premium removes the daily listening limit and unlocks the full feature set — choose a one-time Lifetime purchase, or a Yearly or Monthly subscription, whichever suits you. Subscriptions auto-renew and can be cancelled anytime in Settings. Any future cloud-based voice models may be priced separately from Premium. See the App Store for current pricing in your region. Privacy and safety Your book contents, bookmarks and dictionaries stay on your device. We ship no telemetry and no analytics SDKs. The optional Web Reader is gated to ages 13+ and hidden by default; any imported page can be reported for review. Full policy: yomite.app/privacy. Support Questions or bug reports: support@yomite.app Website: https://yomite.app ■ Terms of Use (EULA) Use of this app is subject to Apple's standard Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/ Terms of Service: https://yomite.app/terms
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Verdict
The clearest difference is price: Yomite Voice at Free against KO Reader's $3.99. Yomite Voice also leads on review sentiment (100% vs 67%). KO Reader's advantage is in-app purchases (none vs 3) and chart position (#54 vs unranked). On ads, device support and iOS requirement 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
Yomite Voice is free to download; KO Reader costs $3.99 up front. Yomite Voice sells 3 in-app purchases, starting at $2.99 per month. KO Reader asks for nothing beyond the download.
| Parameter | KO Reader | Yomite Voice |
|---|---|---|
| Price | $3.99 | Free — better |
| Rating | 3.7 (3 ratings) — better | — |
| Positive reviews | 66.7% of reviews | 100.0% of reviews — better |
| Number of ratings | 3 — better | — |
| Update frequency | — | Every 9 days |
| Ads | No | No |
| In-app purchases | No — better | Yes |
| Monetization | Paid | Free with in-app purchases — better |
| Best chart rank | #54 — better | — |
| Devices | iPhone, iPad, Mac — better | iPhone, iPad |
| Requires iOS | 18.6 | 17.0 — better |
| Further details — not scored | ||
| Size | 26 MB | 1.1 GB |
| Age rating | 4+ | 17+ |
| Developer | James Carrell II | AITYTECH |
Customer experience
KO Reader
Yomite Voice
In-app purchases
KO Reader
No in-app purchases
Yomite Voice
- Yomite Premium — Monthly$2.991 Month
- Yomite Premium — Yearly7 Days trial$22.991 Year
- Premium Voice Pack$59.99









