Vidira

Vidira is a reader for EPUB and PDF books that helps you understand what you are reading, not just turn its pages.

DIG DEEPER Select any passage - or any figure, equation or diagram - and ask what it means. The answer is grounded in the page you are on, not in a general summary of the book.

ASK ABOUT THE WHOLE BOOK Ask a question about anything in the book and get an answer drawn from the actual pages, cited so you can turn to them.

TEST YOURSELF Generate a quiz on any chapter. Questions climb from understanding to applying to analysing, and later sittings return to the topics you missed while introducing ones you have not seen.

SOLVE WITH HINTS Stuck on an exercise? Get one hint at a time instead of the answer. Photograph your own working and have it checked - Vidira confirms the steps that hold and finds the first one that does not.

A SUMMARY OF YOUR OWN READING Vidira pulls together everything you highlighted, every question you asked, and how your quizzes went, into a summary you can save as a PDF and keep.

YOUR BOOKS STAY YOURS Your books never leave your device. Only the passage you ask about is sent to be answered.

VIDIRA PLUS Dig deeper is free every day. Vidira Plus adds whole-book Ask, chapter quizzes, the summary report, step-by-step hints, and a stronger model on every answer.

Subscriptions renew automatically unless cancelled at least 24 hours before the end of the period. Manage or cancel in your App Store account settings.

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