Recursio
Your own vocabulary
Build a personal word list, organize your space, and practice the words you actually use.
Recursio · Language Practice
Practice English that sticks.
Build vocabulary, master grammar, and bring it all back with spaced recall and an AI coach — in one calm, focused app.
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Free to start · iOS & Android
What you get
Everything you need to actually remember
Vocabulary, grammar and recall, plus AI Coach, Writing and Grammar — designed to turn study time into lasting progress.
Grammar by topic
Explore focused topics, run short built-in drills, and continue with AI when you need more.
Spaced recall
Daily Mixed Review brings back active words right before you forget them — calm, focused practice.
AI Coach
Targeted drills and thematic chats that rebuild your weak spots with gentle, guided feedback.
AI Writing
Practice with dictation, Speaking, Sentence Builder, and Writing Scaffold to train active recall.
AI Grammar
Get explanations and corrections in context, so a mistake turns into the next thing you learn.
A look inside
Calm, focused, and built around recall
Swipe through the app — every screen is designed to keep you practicing.
Knowledge center
Learn English with free, focused guides
Clear explanations of English grammar and vocabulary — with real examples, the mistakes learners actually make, and a quick exercise.
- A2
-ed vs -ing Adjectives: bored or boring?
Bored or boring? -ed adjectives say how you feel; -ing adjectives say what causes the feeling. Learn the difference with clear examples.
Read the guide → - B1
20 Commonly Confused English Words
Affect or effect? Its or it's? Clear up common English word pairs and triples learners mix up, with simple tricks to remember each one, plus a quick exercise.
Read the guide → - B1
30 Common English Idioms (and What They Mean)
30 common English idioms grouped by theme, with plain meanings and examples — how to use them naturally and the mistakes to avoid.
Read the guide →
Start practicing today
Download Recursio for iOS or Android, or open the web version right in your browser.