Master The Words.
And Everything Beyond.
Recognition isn’t mastery
A word isn’t learned when you recognise it — only when you can produce it.
Lexi climbs a five-stage ladder — new, recognition, recall, production, known — and a word is only “known” once you can produce it from memory. Weak or stale words resurface automatically, right before you’d forget them. Paste a raw list and AI fills the meanings, examples, synonyms and collocations, with a multi-provider fallback chain so it keeps working even when one provider is down.
See how it works →What’s in your pack
Six ways to drill a word.
The exercise adapts to where each word sits on the ladder — so you can’t just memorise the answer.
Meet the word in context, two ways, no self-grading.
Fill the gap in a natural sentence — spot it in the wild.
Retrieve the word cold, from its meaning alone.
EN↔VN, graded for meaning, not exact spelling.
Use it yourself, unaided — scored by AI.
Say the right thing in a real situation.
The route up
From a blank app to fluent, one climb at a time.
Pick your pack
Sign in with Google, then start from a curated public pack — IELTS Task 1 & 2, Casual, Academic — or paste your own list and let AI enrich it.
Practice & adapt
Lexi serves the right exercise for every word, resurfaces the ones slipping away, and syncs your progress across every device you sign in on.
Reach the summit
Watch each word climb to mastery — and prove it in real IELTS Writing, scored on all four official criteria with inline fixes and a band estimate.
Your climb to fluency
starts today.
Free to start · one tap with Google · your climb fits in your pocket