Learn languages
by reading books

Import any EPUB, PDF, or TXT book, tap a word for an instant translation, and turn what you read into vocabulary you actually remember.

Get it on Google Play See how it works

See it in the app

Biblyx home screen showing the user's book library and Word Lab summary
Your own library, your own pace
Biblyx flashcard showing the word ‘de’ with its meaning and the sentence from the book
Flashcards keep the sentence you found the word in
Biblyx Word Lab screen showing vocabulary broken down by CEFR level from A1 to C2
Your vocabulary, tracked from A1 to C2

How it works

1

Read

Import your own books and read them in a calm, focus-friendly reader — no dictionary tabs, no context-switching.

2

Tap

Tap any word or phrase for an instant translation, then save it to WordLab — your own vocabulary, built from real sentences.

3

Remember

Spaced-repetition flashcards and quizzes bring saved words back right before you'd forget them.

Everything you need, nothing you don't

EPUB, PDF & TXT support

Bring your own library — novels, articles, textbooks, short stories.

Tap-to-translate

An instant translation, pronunciation, part of speech, and CEFR level for any word — without leaving the page.

Real sentence, real memory

Flashcards use the exact sentence from your book, with the word highlighted — never a blank card.

Watch your vocabulary grow, A1 to C2

Every word you save is leveled automatically, so Word Lab shows your progress by CEFR level, not just a word count.

Never forget the hard ones

Words you keep struggling with are flagged automatically, so review time goes where it's actually needed.

Spaced repetition, done right

Flashcards and quick quizzes bring saved words back right before you'd forget them.

Search & highlight

Find any passage inside a book and highlight it for later, in EPUB or PDF.

Cloud Sync, optional

Your books stay on your device. Sign in only if you want your vocabulary and progress backed up.

Premium

Unlimited translations, whenever you need them

Every reader gets a daily allowance of AI-powered translations included. Premium removes the daily limit — monthly, six-month, or yearly.

Frequently asked questions

Is Biblyx free?

Yes. Every reader gets a free daily allowance of AI-powered translations. Premium removes the daily limit with a monthly, six-month, or yearly plan.

What book formats can I import?

EPUB, PDF, and TXT. Your books stay on your device — Biblyx doesn't require uploading them anywhere.

Does Biblyx work offline?

Reading and highlighting always work offline. A built-in dictionary covers common words without an internet connection; new AI translations need one.

How does Biblyx track my vocabulary level?

Every word you save is automatically leveled from A1 to C2 (CEFR), and Word Lab shows your whole vocabulary broken down by level, so your progress is never a guess.

Do I need an account?

No. Biblyx works fully without an account. Sign in only if you want your vocabulary and progress backed up and synced across devices.

What languages does Biblyx support?

The Biblyx interface is available in 8 languages — English, Turkish, Azerbaijani, German, Spanish, French, Italian, and Russian — and you can read and translate books in the language you’re learning.

Is Biblyx available on iPhone?

Biblyx is available first on Android, via Google Play. iOS support is planned for a future release.

How is Biblyx different from a regular dictionary or flashcard app?

Biblyx builds your vocabulary from the real books you read, not generic word lists. Every saved word keeps the exact sentence you found it in, so flashcards use real context instead of a blank card.