Tap to translate
Tap any word to get an instant, context-aware translation right while you read.
Smart Book shows the original and its translation side by side. Long‑tap any word, sentence or paragraph for an instant, context‑aware translation — and keep reading.
From a single tap‑to‑translate to your own AI commands — scroll through what Smart Book can do.
Tap any word to get an instant, context-aware translation right while you read.
Tap the translate button next to a paragraph to see a parallel translation right under the original text.
Get a detailed explanation of how any word or phrase is used in a specific context, from the perspective of the source language.
A built-in library of more than 75,000 books in many languages and on every topic.
Import any of your own EPUB, FB2 or TXT books, and even SRT subtitles. You can also build a parallel-translation book from any text yourself.
Save any words and phrases together with their translation and notes to the app's built-in dictionary.
Get usage examples, etymology, definitions and grammar breakdowns — or ask the AI any question about the book's text.
In the translation panel you can compare translations from different services and AI providers in a single tap.
Add your own API key for Claude, Gemini, ChatGPT, Deepseek or any other AI service.
The app dictionary can sync automatically with Anki or ReWord and export to an Excel file.
Turn any text book into an audiobook — listen to the original, the translation, or both in any order.
Through a range of services the app supports every modern language — read books and get translations for any of them.
Download offline translation to read and translate without an internet connection.
Play back any tapped word or passage to hear how it's correctly pronounced.
Smart Book is a bilingual ebook reader that shows the original text and its translation side by side, so you learn languages by reading the books and stories you love. Long-tap any word, sentence, paragraph or whole chapter for an instant, context-aware translation while reading — and switch between Google Translate, DeepL, Reverso Context, ChatGPT, Claude, Gemini and Yandex in a single tap.
Read from a free built-in library of bilingual stories, or load your own FB2, EPUB and TXT books, and even import .SRT subtitles as parallel text. Save unfamiliar words together with their context to a personal dictionary for spaced-repetition review, and export them to Anki or ReWord. Listen to native-speaker and AI pronunciation, or turn a whole chapter into audio.
Smart Book is free to use, supports around 100 languages, and is available on iOS and Android. Optional PRO (one-time) and MAX (subscription) plans unlock contextual AI translation and custom AI actions, and you can always bring your own API key.