Dunno is a free English dictionary and translator that works completely offline. Look up any English word translate text or photos hear native pronunciation and build your own vocabulary notebook — no internet required.

★ OFFLINE ENGLISH DICTIONARY
Look up English words grammar prepositions and sentence patterns without a connection. Every entry in the dictionary includes definitions examples word forms irregular verbs synonyms antonyms and related words with illustrations. Autocomplete predicts the word from the first few letters.

★ TRANSLATE BY PHOTO VOICE OR TEXT
Point your camera at a word to translate it instantly speak to search hands-free or paste a long passage. Dunno translates English into 89 languages and back: Spanish French Chinese Japanese Korean Vietnamese and more.

★ IDIOMS AND COLLOCATIONS
Find the natural English phrase instead of a word-for-word translation — the part most dictionaries leave out.

★ BRITISH AND AMERICAN PRONUNCIATION
Every word comes with audio in both accents. Record yourself compare with a native speaker and get a score that shows exactly which syllable to fix.

★ ENGLISH GRAMMAR CHECKER
Paste any sentence to catch spelling and grammar mistakes with a clear explanation of each correction. Writing English becomes faster and more accurate.

★ ENGLISH GRAMMAR BY LEVEL
172 grammar structures with examples ordered from easy to advanced so you always know what to learn next.

★ TOEIC PRACTICE TESTS
Full mock tests built to match the real exam with answer keys and a detailed explanation for every question. Tests are sorted by difficulty.

★ VOCABULARY NOTEBOOK
Save any word with one tap and review it with flashcards and quizzes to remember twice as much. Built-in word lists cover 3000 TOEIC words plus IELTS TOEFL and SAT vocabulary organised by subject level and school grade. Track how many words sentences and grammar points you have learned.

★ LEARN IN SPARE MOMENTS
A new English word every day plus vocabulary practice right on your lock screen.

★ ASK THE COMMUNITY
Over 100000 learners share questions and answers about English every day. Stuck on a sentence? Post it and get help.

★ WHAT'S INSIDE
- 400000 dictionary entries with examples
- 200000 English sentence patterns
- 172 grammar structures
- 89 translation languages

★ EXTRAS
Search suggestions saved lookup history adjustable text size and voice and the option to suggest new dictionary entries.

Dunno is also available on the web at https://dunno.ai

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