Booklex · language learning through reading
Turn every book into a language lesson.
Read EPUB and PDF books, tap words for instant translation, save vocabulary, and reinforce it with built-in exercises. One app, one flow, real progress.
4.9 rating on App Store
50 supported languages
Works offline
Learning velocity
Read more. Remember more.
50+
Languages
4.9
App Store
100%
Offline mode
App tour
See Booklex in action
Simple 3-step flow
How it works
01
Open a book
Import EPUB/PDF and start reading content you actually enjoy.
02
Tap and save words
Translate unknown words instantly and add them to your dictionary in one tap.
03
Practice and retain
Play through flashcards, quizzes, and word games with spaced repetition until vocabulary sticks.
Core benefits
Why learners choose Booklex
Instant tap-to-translate
Tap any word to see its translation, meaning, part of speech, real usage examples, and spoken pronunciation — without leaving the page.
AI that understands context
Smart Translator reads the whole sentence, so idioms and set phrases are translated the way they are actually used — not word by word.
Your personal vocabulary engine
Every saved word lands in a per-book list with its own learning progress, so you always know what came from where.
Five ways to practice
Flash Cards, Quiz Test, Fill the Gap, Memory Game, and Word Puzzle turn your saved words into a quick daily game.
Spaced repetition built in
Words come back for review at growing intervals, moving them from short-term memory into active language you can actually use.
Read anywhere, online or offline
Load EPUB and PDF books into your library and keep reading and translating without an internet connection.
Everything included
One app for the whole reading journey
Booklex replaces an e-reader, a dictionary, and a flashcard app — here is what is inside.
Import your own books — open any EPUB or PDF file in seconds.
Built-in book gallery — a free library of classics, ready to read.
Web articles — read articles from the web with the same tap-to-translate.
Highlights and notes — mark passages in five colors and add your own notes.
Search and table of contents — jump to any chapter or phrase instantly.
Audio pronunciation — hear every word spoken naturally, at any speed.
Share word lists — send saved vocabulary to friends with a single link.
50+ languages — read in one language, translate into any other, fully offline.
Start your reading-based language journey today
Download Booklex and keep learning with practical guides in our catalog.