CastReader - AI Read Aloud

CastReader

In-app purchases

About this app

CastReader helps you read less with your eyes and understand more with your ears.

Turn Kindle books, PDFs, EPUBs, web pages, screenshots, and pasted text into guided listening sessions. Hear natural voices with synced highlights, auto-scroll, background playback, lock-screen controls, and AI explanations when the text gets hard.

LISTEN TO KINDLE BOOKS
CastReader is built for long-form reading on your phone:
• Listen to Kindle books with synced highlighting
• Follow the text as it reads aloud
• Auto-scroll through long pages
• Resume where you stopped
• Play in the background or from the lock screen
• Ask AI to explain hard passages, arguments, terms, and characters

AI EXPLAIN — NOT JUST READ ALOUD
Most text to speech apps only pronounce the words.

CastReader can explain the meaning.

When a passage is dense, foreign, technical, academic, or hard to follow, AI Explain creates a spoken explanation and marks the important parts on the original text. It highlights key ideas, circles terms, numbers steps, and talks you through the passage like a tutor reading beside you.

READ ALOUD ALMOST ANYTHING
Use CastReader for:
• Kindle books
• PDF documents
• EPUB ebooks
• Web articles and URLs
• Photos and screenshots
• Scanned pages
• TXT files
• Pasted text
• Study notes
• Research papers
• Reports, contracts, and manuals

MADE FOR LONG READING
CastReader is useful when you want to finish more of what you already planned to read:
• Listen during commutes, walks, workouts, and chores
• Turn books and documents into audio
• Follow every word while learning a language
• Rest your eyes without losing your place
• Understand difficult papers, books, and technical documents
• Review long material without staring at a screen

WHY CASTREADER
• Natural AI read-aloud voices
• Word-synced highlighting
• Auto-scroll while listening
• Resume progress
• Background playback
• Lock-screen controls
• AI explanations in English and Chinese
• PDF, EPUB, TXT, image, URL, scan, and paste import
• Dark mode
• Adjustable playback speed

FREE TO START
Use CastReader with a free daily read-aloud and AI explanation quota. Upgrade to Pro for longer listening, more explanations, premium voices, faster playback, and heavy reading workflows.

Kindle is a trademark of Amazon. CastReader is an independent tool and is not affiliated with Amazon or Kindle. Availability may depend on the book, publisher, platform, and content you can access.

What’s new

• Added a Content Inbox for shared links, text and files, with article titles, image previews and more reliable web extraction. The new home Pro card enables faster annual upgrades. Also improves 8-language OCR and imports, sentence alignment, quota and purchase checks, voice switching, and playback stability.