Mobile app
iPhone and iPad
Download on the App Store
Best for listening to Kindle books, PDFs, EPUBs, pasted text, and long reading sessions on your phone.
Get the iOS AppOfficial CastReader downloads
Download CastReader for Every Reading Surface
Use the mobile app for Kindle books and long listening sessions, or an extension for Safari on Mac, Chrome, Edge, or Firefox to read supported webpages in place.
Choose your platform
Download Safari extension for Mac
Mobile apps
Mobile app
Android
Download CastReader for Android on Google Play
Use CastReader on Android for Kindle read aloud, synced highlighting, background playback, and AI explanations.
Google PlayBrowser extensions
Browser extension
Google Chrome
Install from Chrome Web Store
Best for webpages, Google Docs, Claude, ChatGPT, Kindle Cloud Reader, PDFs in the browser, and platform-specific extractors.
Add to ChromeBrowser extension
Microsoft Edge
Install from Microsoft Edge Add-ons
Use the native Edge listing for webpages, documents, AI chats, Kindle Cloud Reader, browser PDFs, and supported reading sites.
Add to EdgeBrowser extension
Firefox
Install from Firefox Add-ons
Use CastReader in Firefox for webpages, Google Docs, AI chats, Kindle Cloud Reader, browser PDFs, and supported reading sites.
Add to FirefoxMac browser extension
Safari for Mac
Get CastReader for Safari on the Mac App Store
Install the Mac app to enable its Safari extension, then listen to supported articles and reading pages with synchronized highlighting. Requires macOS 14 or later.
Get CastReader for SafariMac Safari extension
Your first read in Safari
Install the Mac app once. Read and follow the highlights inside Safari.
01
Install and open the Mac app
Install CastReader for Safari from the Mac App Store, then open it from Applications.
02
Turn on the extension
In the app, open Safari Settings. In Extensions, select the checkbox beside CastReader. The Mac app helps with setup; reading happens in Safari.
03
Allow the page you want to read
Open an article in Safari and click the orange CastReader toolbar icon. When Safari asks, allow access to this website. Refresh a page that was already open.
04
Press play and follow the words
Click the headphones button on the right edge of the article. Keep the page in view: hear the voice, follow the highlights, and use pause or speed controls whenever you need.
Illustrated setup steps. Labels may vary by Safari version.
Start with a short article and a free voice. Sign-in is optional for your first read; use Settings → Sign in to restore an existing account.
Something missing?
I cannot see CastReader in Safari
Open the installed Mac app once, then check Safari → Settings → Extensions. If the extension is on but the icon is hidden, use View → Customize Toolbar to add it.
The extension is on, but nothing appears on the page
Allow access to the current website and refresh the tab. Try an ordinary article first; Safari Start Page, browser settings, and protected pages cannot be read.
The page is silent
Click play yourself, check the volume and tab mute setting, and keep the article visible. Check the on-page message for a connection or usage-limit issue.
Choose by where the content lives
The apps share a product and Pro entitlement, but each surface solves a different extraction and listening problem. Start with the one that matches your source.
Listen to Kindle books on my phone
iOS or Android
The mobile app is designed for a phone-first Kindle bookshelf, highlighting, background playback, and long listening sessions.
Read a webpage, Google Doc, or AI answer in place
Browser extension
The extension works where the page is rendered and can preserve in-page extraction and highlighting on supported sources.
Open a PDF, DOCX, EPUB, image, or copied text
Mobile or upload workflow
Use a document-friendly surface instead of forcing a local file through an ordinary webpage reader.
Use Pro on more than one supported surface
Same login email
Pro entitlement follows the login email. File libraries and reading progress can still vary by workflow and are not promised as universal sync.
Not sure which one to install?
I want to listen to Kindle books on my phone
Start with the CastReader mobile app for iPhone or Android.
I need Google Docs or webpages read aloud
Install the browser extension so CastReader can read the page where it lives.
I want a quick online text reader
Paste text into the Read This to Me tool for instant audio.
I need difficult text read and explained
Use Read & Explain for source-linked guidance at overview, standard, or deep depth.
One account across browser and mobile
Sign in with the same email to keep your CastReader Pro status aligned across supported surfaces. Anonymous device allowances do not become a synced Pro account, and content or progress availability can vary by workflow.
Download FAQ
Which CastReader app should I install first?
If your main goal is listening to Kindle books on your phone, start with the iOS or Android app. For supported pages in Safari on a Mac, install CastReader for Safari from the Mac App Store. Chrome, Edge, and Firefox have their own extensions.
Is CastReader available on Android?
Yes. CastReader is available on Google Play for Android and supports mobile read-aloud workflows such as Kindle listening, highlighting, background playback, and AI explanations.
Do I need both the mobile app and browser extension?
Not always. Use the mobile app for phone-first reading and use the extension for browser pages that need in-page extraction and highlighting. Many users install both because they read across devices.
Is CastReader affiliated with Amazon or Kindle?
No. CastReader is not affiliated with Amazon or Kindle. Amazon and Kindle are trademarks of Amazon.com, Inc. or its affiliates.
Can I listen to the voices before installing?
Yes. The CastReader reading voice library uses the same versioned public catalog as supported mobile clients and includes real samples, language status, and Free or Pro tier.