Build real vocabulary while you read

Words you look up are saved together with the exact sentence you found them in. Every saved word is then automatically highlighted with contextual inline meanings whenever it appears again in your books, articles, or podcast transcripts. No deck-building drills — vocabulary grows naturally through repeated encounters in real reading.

Available on iPhone, iPad, Android, Mac, Windows, E-Ink, and Chrome.

Save words with their original sentence in one tap

Tap any word while reading to get a context-matched explanation, then tap once to save it. The original sentence is saved alongside the word automatically — no app-switching, no manual copying.

Re-encounter saved words with quiet inline meanings

Every saved word is automatically highlighted when it appears again across your library, with a concise inline meaning resting quietly above it. Understand it at a glance without ever having to look it up twice.

Listen to hard-to-remember words on Word Radio

Reviewing is no longer just staring at isolated flashcards. Each word returns inside its original scene. Put headphones on during your commute or walk, and Word Radio reads words, examples, and meanings hands-free.

How it differs from traditional flashcard apps

No manual deck building — sentences save automatically

Words come directly from your real reading, with their context sentences attached without extra effort.

Review in real context rather than isolated cards

You recall the moment and story where the word lived, instead of memorizing a generic list of definitions.

Natural reinforcement through future reading

Automatic highlights and inline meanings bring saved words back in every new text you open, creating a natural retention loop.

Frequently Asked Questions

What do I actually hear on Word Radio?
You decide how much audio plays with each word: English explanations, native explanations, example sentences, or simple repetitions. Words marked as mastered drop out of the rotation automatically.
Which devices does it work on?
iPhone, iPad, Android phones and tablets, Android e-ink devices, Mac, and Windows — plus a Chrome extension for reading web articles.
What level of English does it support?
Explanations adapt to your level, from CEFR A1 to C2. When an explanation is still challenging, one tap shows an explanation in your native language.
Do highlights work in my own books?
Yes. Import EPUB, PDF, web articles, and podcast transcripts — saved words are highlighted across everything in your library.

Works together with

Build real vocabulary through reading, not memorization.