Retlo
Learn words.
Actually remember them.
Retlo is your personal AI vocabulary coach — helping you learn, practise and remember words through personalised practice.
Free to use. Runs in your browser — nothing to install.
Example session
Your coach asks
What does alacrity mean?
You said: It means eager willingness.
Retlo said: Correct. Nice work.
Knowing a word once isn't enough.
You can recognise a word today and forget it next week. Retlo is designed around active recall and reinforcement, so the words you struggle with come back when you need them.
How Retlo works
Learn. Recall. Reinforce. Remember.
One loop that moves you from understanding a word to keeping it.
- 01Learn
Understand the word.
Definition, simple meaning, an example sentence, synonyms, antonyms, a mnemonic and pronunciation — so the word makes sense before you practise it.
- 02Recall
Don't just recognise the answer. Say it.
Practise out loud. Your coach asks, you answer by speaking, and Retlo evaluates what you meant rather than the exact words you used. You can type instead whenever you prefer.
- 03Reinforce
Targeted practice on your weak words.
Retlo learns which words you struggle with and gives you targeted practice, mixing them with new words and overdue reviews.
- 04Remember
Words come back so they stay with you.
Each word is scheduled to return based on how well you recalled it, so the ones you nearly lost show up again sooner.
Your vocabulary coach talks with you.
Not another flashcard deck. Not another list of words. A tutor you can practise with.
Example exchange
- Retlo
- “What does alacrity mean?”
- You
- “It means eager willingness.”
- Retlo
- “Correct. Nice work.”
Just talk to your coach.
No typing. No endless flashcards. Just speak.
- Hands-free practice
- Spoken answers
- Feedback after each answer
- Personalised evaluation
Retlo speaks the prompt, listens to your answer, and judges what you meant rather than the exact words you used. Say “next” to move on without touching the screen — or type your answers instead if you're somewhere quiet.
Example word
Aloof
Learning/əˈluːf/
- Definition
- Not friendly or forthcoming; cool and distant.
- Simple meaning
- Keeping your distance from other people.
- Example
- He stayed aloof from the rest of the group all evening.
- Synonyms
- Detached, distant, remote
- Antonyms
- Friendly, warm, sociable
- Mnemonic
- A-LOOF — someone up on the roof, far above everyone else.
Your vocabulary, all in one place.
Every word you practise keeps its definition, simple meaning, example, synonyms, antonyms, mnemonic, pronunciation and your progress.
Retlo learns how you learn.
Everyone struggles with different words. Retlo keeps track of your performance and adapts practice around the words that need your attention.
Example progress
Your vocabulary
- Words studied
- 128
- Mastered
- 46
- Learning
- 57
- Needs review
- 25
- Accuracy
- 78%
- Day streak
- 9
Illustrative example — your own numbers come from your practice.
Less memorising.
More remembering.
Retlo isn't built around simply showing you more words. It's built around helping you recall the words you've learned and recognise the ones that still need work.
Built for the words you need.
Today Retlo focuses on exam-style and academic vocabulary. The same practice loop works wherever you want a stronger vocabulary.
- GRE preparation
- GMAT preparation
- Academic vocabulary
- English vocabulary
- Personal language improvement
Frequently asked questions
Start remembering the words you learn.
Retlo is free to use. Create an account and start your first session.
Start learning — it's free