Vocabulary that sticks forever
Learn By Heart uses spaced repetition and AI to make every word you learn stay learned. Add vocab, review daily, master anything.
By signing up, you agree to our Terms & Conditions.
Everything you need
Built for serious learners
Six tools, one goal: make vocabulary learning effortless and lasting.
Smart Flashcards
The SM-2 spaced repetition algorithm schedules each card at exactly the right time — so you review just before you forget.
AI-Powered Vocabulary
Every word gets automatic translations and example sentences generated by AI, so context is always just one tap away.
Practice Lab
Generate AI dialogues and exercises from your own vocabulary list. Real conversations, built around words you're learning.
Progress Tracking
See your review streak, mastery level, and upcoming due dates at a glance. Stay motivated with data-driven insights.
CSV Bulk Import
Already have a word list? Import it instantly from CSV with automatic translation support — no manual entry required.
Pronunciation Feedback
Speak aloud and get instant AI corrections on your pronunciation. Build confidence before your next real conversation.
How it works
Three steps to fluency
Add your vocabulary
Type words manually, paste a CSV, or let AI extract vocabulary from any text. Every word gets translations and examples automatically.
Review daily
The SM-2 algorithm surfaces only the cards due today — no more, no less. Short, focused sessions that fit into any schedule.
Master it
Words move from 'learning' to 'mastered' as you prove recall over time. Watch your progress meter fill as retention compounds.
Start learning for free
No credit card required. Build your first deck in minutes and review today.