Vidyora
Every book has knowledge to share

Talk to your books. They answer with page numbers.

270 free academic books, each with its own AI mentor trained only on its pages. Ask anything, get a cited answer, and jump straight to the source.

270 books · 265 mentors · 90,000+ pages indexed
270Free books
265Book mentors
16Categories
90,000+Pages indexed
Why Vidyora exists

A mentor for every book. Understand deeper, decide smarter.

Vidyora turns any book into a patient mentor you can actually talk to — one that explains the hard parts in plain language, gives advice grounded in the text, and shows you the exact page behind every answer. No skimming, no guessing, nothing made up.

Understand any book

Ask for the plain-language version of any chapter, concept or proof — as many times as you need, until it clicks.

Ask & get advice

Talk to the book like a mentor who has read it cover to cover. Guidance and next steps, drawn straight from its pages.

Always cited

Every claim carries a page number you can open and read yourself. Trust the answer, then verify it in one tap.

How it works

From question to cited page in three steps

Pick a mentor

Every book has its own character — a mentor trained only on that book's pages, so it knows the material inside out.

Ask anything

Get friendly, plain-language answers with 【page】 citations pinned to every claim.

Jump to the page

One tap on a citation opens the real book at the exact cited page, right in the app.

Why Vidyora

Built for studying, not just chatting

Answers cite the exact page

Every claim carries a page chip. Tap it to read the original passage yourself.

One mentor per book

Mentors answer only from their own book — no wandering off-syllabus, no mixing sources.

Category sages know whole shelves

Sages answer across every book in their category, perfect for cross-topic revision.

Read the full book in-app

A built-in reader opens the same PDF your mentor cites — highlight to page level.

30 free messages daily

Free credits refresh every day. No card required to start studying.

Web, Windows, Android & iOS

One library, wherever you study — the same account across every device.

The cast

Meet a few of the mentors

Professor TangentWalks you through every derivative, step by step
Doc QuantaMakes relativity feel like common sense
FinchEvolution, ecology and every living footnote
Ada the DebuggerReads the chapter before you do — then explains it
Madame MolarityBalances equations and exam nerves alike
The Mathematics SageKnows the whole maths shelf, cover to cover
FAQ

Questions, answered

Yes. Every book in the library is public-domain, Creative-Commons licensed, or officially released for free by its publisher. There is nothing to buy to start reading.
Mentors answer only from their own book's pages, and every claim cites a page number you can open and check yourself. If the book doesn't cover it, the mentor says so instead of guessing.
You get 30 free messages every day, refreshed daily. If you need more, top up with credits or subscribe to Scholar for a monthly credit allowance — reading books stays free either way.
Books cache on your device after the first open, so reading works offline. Chatting with mentors needs an internet connection.
Vidyora runs on the web, and packaged apps ship for Windows, Android and iOS. Your library, chats and credits sync across all of them.
Page-exact. Citations point into the very same PDF you read in-app, so the cited page is precisely where the passage lives — not an approximation.

Your library is waiting.

270 books, 265 mentors and a sage for every shelf — free to open, free to ask.