Which reading apps have AI features, and which are worth using?

"AI" covers very different tools in reading apps. Sorting them by what they do for you makes the choice easier.

• Recaps up to your place: a summary of what you have read so far, and nothing after. Kindle Story So Far, Google Play Books Catch me up, Spotify Recaps, Magic Bookmark.
• Questions about the story: ask who someone is or why something happened, with answers limited to your place. Kindle Ask this Book, Ask Play Books, Magic Bookmark.
• Character help: a cast list or character lookups. Magic Bookmark's cast list grows as you meet people; Kindle X-Ray works in supported Kindle books.
• Reading aloud: synthetic voices that read text, such as Kindle Assistive Reader and Speechify.
• Discovery: help choosing the next book. Audible's Maven finds titles from a request such as a thriller under eight hours.
• Your own notes: Basmo turns notes you wrote into an audio recap, and Readwise Reader's Ghostreader answers questions about saved text.

This table comes from our study of 30 reading apps, which recorded only features each maker describes in its own listing or help pages.

Each maker describes its recap as limited to what you have read, and none publishes an accuracy rate. Two things reduce the risk of errors and spoilers. First, a tool that knows your exact place (from the book you are reading in its app, or from a photo of your page) does not have to guess where you are. Second, a tool built for one book's text up to your place has less room to pull in later events than a general chatbot answering from memory.

General chatbots such as ChatGPT, Gemini or Claude do not know which page you are on. You have to tell them, and trust them not to mention later events, and they can mix up details. We describe how these tools work; we did not run an accuracy test.

• Is your book covered? Every recap tool works on a limited set of titles. Check before you rely on it.
• Where does it work? Kindle's tools are US only; Google's cover select English titles; Spotify's are a beta for select English audiobooks.
• What does it cost? Kindle, Google and Spotify include their features with the book or plan. Magic Bookmark charges per book after a free first credit; its website also advertises a two-week free trial.
• What does it record? Check the app's privacy label. Magic Bookmark's lists identifiers used to track you; Libby, which publishes no AI features, lists only diagnostics.
• How do authors feel about it? The Authors Guild has raised concerns that authors cannot opt their books out of Kindle's Ask this Book. Spotify says publishers can switch Recaps off for their titles.

If you read Kindle ebooks in the US, use what comes with them. If you buy from Google Play, use Catch me up. If you listen on Spotify Premium, Recaps cover what you heard. If you read paper, borrow from the library, or switch formats, Magic Bookmark is the option that follows your copy, on iPhone, for its supported titles. For coming back to a book you paused, our get back into a book page puts these side by side.

Summary apps such as Blinkist and Shortform summarize a whole book, usually nonfiction, so you can learn its ideas without reading it. That is useful before you read, or instead of reading, but it is the opposite of spoiler-safe for a novel you are in the middle of. Blinkist's AI, in its Pro plan, lets you ask follow-up questions about summarized content.

Recap features do a different job: they help you keep reading the book you have, by reminding you only of what you have already read. If you are halfway through a novel, you want a recap; if you are deciding whether to read a nonfiction book at all, a summary may do. Our study of 30 reading apps separates the two.

These features are new and moving quickly, so check the date on any page that describes them, including this one. Amazon has said Ask this Book will expand to Kindle devices and the Android app. Google brought Book insights to iOS and more than a million English ebooks in September 2026. Spotify launched Recaps as a beta. Magic Bookmark added audiobook support in October 2026 and says Android is on its roadmap.

We recheck every feature on this page against the makers' own pages and update the date when anything changes. If you spot a change first, tell us through the contact page.