After looking at reading apps such as Speechify and NaturalReader, Kindle owners often have a more specific question: can I listen to the book I already bought? If you read on an iPhone or iPad and occasionally use a Mac, you probably want to make more of your existing library, not start searching for a different collection of books.
CastReader offers a way to do that. On iPhone and iPad, you use the app; on Mac, you use a browser extension. Open Kindle content you can access and listen to natural-sounding narration while the original text is highlighted. You can read closely when you want to, then keep listening when looking at a screen is less convenient.
The price is another reason to consider it. CastReader Pro costs $4.99 a month or $35.99 a year on its website, with the annual plan working out to about $3 a month. If you mainly want to listen to novels, articles, and documents, you may not need to pay for a full suite of audio-production tools.
Start with the device you already use
| Device | How to listen to Kindle books | Best suited to |
| iPhone | The Kindle section in the CastReader app | Portable listening, with background and lock-screen playback |
| iPad | The Kindle section in the CastReader app | Reading along on a larger screen with synchronized highlighting |
| Mac | The Chrome or Edge extension with Kindle Cloud Reader | Listening in the browser while following the book’s text |
There is no need to set up every device before you start. If you usually read on your iPhone, begin there. If you prefer settling into a long book on the sofa with an iPad, try the tablet. Mac is another reading option, not a required step before you can listen on your phone.
Open your Kindle library on iPhone
Download the CastReader iOS app from the App Store. Open its Kindle section, sign in to your Amazon account, open a book you can access, and start read-aloud playback. The text is highlighted as the voice reads, without requiring you to copy chapters into another document first.
Use it to continue the novel you are halfway through, or return to a nonfiction book you have been meaning to finish. You can start with the chapter you want to read. The point is to make your existing books easier to spend time with, without finding a new reading list or producing an audio file yourself.
Background and lock-screen playback let you keep listening without leaving the book on screen. When you are doing something that does not require looking at the page, follow the narration. When a passage deserves a closer look, return to the app. Reading and listening can be parts of the same session.
The Kindle library inside the CastReader app.
Follow the words as you listen on iPad
An iPad is a comfortable choice if you like to read along. Its larger display fits more text, means less scrolling through long paragraphs, and makes character names and other details easier to see. CastReader highlights the current text as it reads, making it easy to follow the voice on the page.
Highlighting does not mean you have to watch every word. It helps you find your place whenever you glance back: a description you like in a novel, perhaps, or an argument you want to remember in a nonfiction book. If you would rather just listen for a while, you can do that too.
The iPhone is easy to carry with you; the iPad gives the page more space. Neither requires you to change what you enjoy reading. Choose the one that suits the moment, whether you want to take a book with you or sit down and follow the text.
Listen in Kindle Cloud Reader on Mac
On a Mac, install the CastReader extension in Chrome or Edge, then open Kindle Cloud Reader and sign in to your account. Open a supported book and start read-aloud playback. The extension reads the page’s text and highlights the corresponding words as it goes.
On Mac, you listen through the browser extension rather than the mobile app. The book stays open in the browser, with narration and highlighting following its text. For a demonstration, take a look at CastReader’s Kindle read-aloud features.
If you enjoy reading nonfiction at your desk, a Mac display gives longer paragraphs room to breathe while you listen. You can also hear a few pages of a novel during a break. You do not have to save an entire book as a separate text file before getting started.
Natural narration or a familiar voice of your own
A voice matters more when you are listening to a whole book than when you are trying a short sample. CastReader offers natural, fluent narration with adjustable speed. A novel may be more enjoyable at an unhurried pace, while familiar material can suit a faster setting. Choose a speed that is comfortable to follow.
Voice cloning adds another option. Read one sentence as prompted to generate a clone of your voice; there is no need to record the book yourself. The result can read new chapters in your familiar tone, bringing a conversational, personal quality to the listening experience.
It does more than play back the sentence you recorded. The generated voice can read new text, giving you a different way to enjoy the same book. If you like the sound of your own voice or simply want a more personal listening experience, it is a feature worth trying alongside the existing narration voices.
CastReader also has Explain, which explains the content aloud instead of reading every word of the original. It is an alternative when you want to hear the material presented differently. For following a novel or working through a whole book, regular read-aloud playback is the straightforward choice.
Your reading does not have to stop at Kindle
If your books are spread across services, CastReader also lets you listen to books from Kobo, Google Play Books and O’Reilly. Open the service you want to use through CastReader to get started. It also reads PDFs, EPUBs and web articles, so you can use it for a book one day and a long article the next.
That is useful if you divide your reading time between books and documents. You may not need separate subscriptions for ebooks, work files and web pages. More important is whether the material you regularly read is convenient to open and hear, using the appropriate app or browser option on your device.
Choosing between CastReader and other ways to listen
The Kindle app’s Assistive Reader uses device voices and offers real-time highlighting in supported books. If that already does what you need, it remains an option. A dedicated app such as CastReader is worth considering when you want to explore different voices, use your own cloned voice, or listen to web pages and files as well.
Audible offers separately produced audiobooks. If you enjoy a particular narrator’s performance or want a produced audio edition, look for the relevant title there. Text-to-speech serves a different purpose: it reads the ebook text you can access, so you do not need to find a separate audiobook edition for each book.
You can try CastReader’s free option before deciding on Pro. The prices above are website prices in US dollars, checked on October 9, 2026; annual plans are paid upfront, and local App Store prices apply to in-app purchases. CastReader supplies the reading tool, while your books still come from the platforms you already use.
If your main goal is to spend more time with your Kindle library, begin with the book you are reading now. Take it along on iPhone, read and listen on iPad, or use the browser on Mac. Natural narration, clear highlighting, and a lower ongoing cost can make listening an easy addition to a reading habit you already have.
