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How to Listen to MOBI and AZW3 Books on iPhone

MOBI and AZW3 are Kindle formats that iPhone can't open on its own. SpeakCove reads DRM-free copies aloud without conversion. Kindle store purchases stay in Amazon's apps.

Published
Updated
Reading time
3 minutes

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MOBI started as the Mobipocket ebook format, which Amazon bought and used for early Kindle books. AZW3, also called KF8, is its successor with better layout and styling. Both store compressed HTML inside the same Palm database (PDB) container. Today you mostly meet them in Calibre libraries, older ebook collections and Kindle-format downloads from sites like Project Gutenberg. The important limit: Kindle books bought from Amazon are DRM-protected and only open in Amazon's own apps and devices. DRM-free MOBI and AZW3 files can be read aloud elsewhere.

The Challenge

  • iOS has no built-in support for MOBI or AZW3. Apple Books reads EPUB and PDF, so a .mobi or .azw3 file in Files has nowhere to open.
  • Kindle books bought from Amazon are encrypted. No third-party reader can import them, so tools that promise to read "your Kindle library" only work with DRM-free files.
  • Converting to EPUB with Calibre works for DRM-free books, but it needs a computer, takes a step per book, and can move chapter breaks or drop images.

How to Listen with SpeakCove

  1. 1Make sure the file is DRM-free

    Books from Calibre libraries, Project Gutenberg's Kindle downloads and authors who sell without DRM usually work. Files from Amazon's Kindle store do not.

  2. 2Import the MOBI or AZW3 file

    Tap the file in Files or a mail attachment and share it to SpeakCove, or tap + > Import File in SpeakCove. There is no need to convert it to EPUB first. If the file is protected, SpeakCove tells you right away.

  3. 3Let SpeakCove lay out the book

    SpeakCove decompresses the book's text, keeps its embedded images, picks up the title and author, and lays everything out as pages. A long novel takes a little longer than a PDF.

  4. 4Choose a voice and speed

    Serena and Max are free. Speed goes from 0.75x to 1.75x, and the current sentence is highlighted so you can glance at the text when a name or term is unclear.

  5. 5Set the sleep timer for bedtime

    Choose 5, 10, 15, 30, 45 or 60 minutes. Playback stops on its own, and SpeakCove keeps the page and sentence for next time.

Other Methods

  1. Kindle app with Speak Screen

    • Works with Kindle books you bought from Amazon
    • Speak Screen is free and built into iOS
    • Uses the iOS system voices
    • Reads all text on the screen, not only the book
    • Each time you start it, it begins at the page on screen

  2. Convert with Calibre, then Apple Books with Speak Screen

    • Calibre is free and handles MOBI and AZW3 well
    • The resulting EPUB opens in Apple Books
    • Needs a Mac or PC
    • Only works on DRM-free files
    • Chapter breaks and images can shift during conversion
    • You still listen with the system voice

  3. Buy the Audible edition

    • Professional human narration
    • Nothing to import: buy it and play it in the Audible app
    • A separate purchase or credit for each book
    • Many books, especially older or niche ones, have no audio edition

Listening with SpeakCove

  • Opens both MOBI and AZW3 directly on iPhone and iPad, with no Calibre or computer involved.
  • Works offline: reading, OCR and voices run on your iPhone, even in airplane mode.
  • Checks for DRM on import and says so, instead of failing on a protected file.
  • Keeps the book's embedded images on the page while it reads the text, and highlights each sentence.
  • Free with two voices and all 31 languages. Premium ($14.99 once) adds 8 voices, lock-screen and background playback, and CarPlay.
Try it · On the web

Free Text to Speech, Right in Your Browser

Paste text or open any file (PDF, EPUB, Word, scans and more) and press Play. SpeakCove reads it aloud with natural voices in 31 languages. It's free, with no sign-up and no length limit, and your text never leaves your browser.

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Download on theApp Store
Scan with your iPhone camera to get the app.

  • One-time purchase, no subscription

    Free to start with 2 voices and every format. $14.99 once unlocks all 10 voices, background playback and CarPlay. No subscription, ever.

  • Listen in the car with CarPlay

    Your documents on your car's screen and speakers, with CarPlay in Premium.

  • Works offline, fully on-device

    Your documents never leave your device. The app has no analytics and no ads, and reading and voices work in airplane mode.

Frequently Asked Questions

Can SpeakCove read the Kindle books I bought from Amazon?
No. Kindle store books are DRM-protected and only open in Amazon's apps and devices. To hear those, use the Kindle app with Speak Screen or an Audible edition.
Does SpeakCove support AZW3 and KFX?
It supports MOBI and AZW3. KFX and older AZW files are not supported. If a DRM-free book is only available as KFX, convert it to EPUB or AZW3 first.
Do I need to convert MOBI to EPUB first?
No. Import the .mobi or .azw3 file as it is, and SpeakCove lays it out and reads it.
Are images and formatting kept?
Embedded images and basic formatting such as headings and italics appear on the page, and SpeakCove reads the text in page order.
Is it free to listen to MOBI files?
Yes. All ten formats, including MOBI and AZW3, are free with the two free voices, the sleep timer and sentence highlighting. No ads, no account.

Sources

  1. Apple Support: Hear iPhone speak the screen, selected text, and typing feedback
  2. Calibre e-book management
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