Recursio
Stop forgetting the English you learn.
Save the words you actually meet, bring them back with spaced recall right before you'd forget them, and turn your mistakes into practice with an AI coach. One calm, focused app.
Free to start · iOS · Android · Web — no install needed
Learning isn't the hard part.
Remembering is.
Recursio is built around one idea from memory science: review a word right before you'd forget it, then make yourself use it.
Capture your words
Add the words you meet in shows, articles and work — your list, not someone else's deck.
Review at the right moment
Spaced recall brings each word back just before it fades. A few focused minutes a day.
Use them, don't just recognize them
Dictation, speaking, sentence building and an AI coach turn passive words into active English.
Built around your words
Words from your life, not a random deck
Search, spaces to organize, frequency tags — and one tap to save the word you just met in a show or an email. Your list grows out of your real English.
One short session. Everything that's due.
Recursio decides what to ask and when, across all your active words. You just show up for a few calm minutes a day — the schedule does the remembering.
Your mistakes become your next lesson
The coach watches your weak spots and builds short drills from your actual mistakes. Thematic chats, writing feedback and grammar explanations — in context, when you need them.
Made for the way you actually meet English
You watch and read a lot
Shows, articles, Reddit — you meet great words daily and lose them by Friday. Save them in two taps; Recursio brings them back.
English for work
Meetings, emails, interviews. Build the vocabulary of your job and drill the grammar that makes you sound precise.
Stuck at B1
You understand a lot but plateaued. Active recall — writing, speaking, building sentences — is what moves you to B2.
I'm Alex. Recursio started from a problem we had ourselves: we kept forgetting the English we were “learning”. Ready-made decks never stuck — the words we met in shows, articles and at work did. So Recursio starts from your words, and keeps bringing them back until you actually use them.
We're a small independent team: no growth department, no dark patterns — just a tool we use every day ourselves. If something doesn't work for you, write to me. I read and answer every email.
Three free ways to practice
The app is one part of Recursio. Guides, listening and a beginner course are free on this site.
Grammar & vocabulary guides
Focused explanations with real examples, common mistakes and a quick exercise.
Browse the guides → ListenPodcast, stories & calm listening
Slow, clear B1 English: a two-host podcast, easy stories and calm sessions.
Start listening → StartEnglish from zero
A structured beginner course — 100 short lessons, explained in your language.
Take the free course →- A2
How to Improve Your English Speaking
Why speaking feels hard — and seven practical ways to speak more fluently, from learning chunks to talking to yourself, plus the mistakes that hold you back.
Read the guide → - A2
30 Essential Phrasal Verbs for Beginners
The 30 most useful English phrasal verbs for beginners, grouped by everyday theme, with meanings, example sentences, common mistakes, and a quick exercise.
Read the guide → - A2
A, An, The: English Articles Explained
When to use a, an, the — or no article at all. The rules for English articles with clear examples, the mistakes learners make most, and a quick exercise.
Read the guide →
Questions, answered
Is Recursio free?
How is it different from Anki or Duolingo?
Do I need to install anything?
What level do I need?
What languages can I learn?
Start remembering today
Open Recursio in your browser and add your first five words — the review schedule takes it from there.
Starting from zero? Take the free beginner course →