Master English vocabulary,
one word at a time.
Build your vocabulary with spaced repetition, AI-generated examples in your native language, and a streak system that keeps you coming back daily.
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Ephemeral
क्षणभंगुर — lasting a very short time
“The beauty of cherry blossoms is ephemeral, lasting only a few days.”
चेरी ब्लॉसम की सुंदरता क्षणभंगुर है, केवल कुछ दिनों तक चलती है।
Learn English in the language you think in.
Every AI-generated example sentence comes with a translation in your native language — so meaning sticks immediately.
Everything you need to remember.
Real tools backed by cognitive science. Not flashcards from 1987.
Adaptive spaced repetition
The SM-2 algorithm watches your accuracy and times each review for the moment your brain is about to forget.
AI example sentences
Generate natural example sentences with one tap. Each one comes with a translation in your native language.
9+ native languages
Bengali, Hindi, Arabic, Spanish, French, Portuguese, Turkish, Urdu, Indonesian — pick what you think in.
Smart mixed quizzes
Multiple choice, fill-in-the-blank, and reverse-translation modes — auto-generated from your own word list.
Streaks, XP & levels
Daily streaks reward consistency. XP and levels turn vocabulary practice into a habit you actually keep.
Export anywhere
Download your vocabulary as Excel, Word, or print-ready PDF. Your data stays yours.
Three steps. Real fluency.
Add your words
Type a word, paste a list, or grab them from articles you read. Tag them and set difficulty.
Tap to generate
Get a natural example sentence and a native-language translation in seconds, powered by AI.
Quiz, repeat, master
Daily quizzes resurface words at the right time. Watch your accuracy climb week after week.
Words that stick.
From IELTS prep to medical-school flashcards — here's what learners say after their first month.
“The native-language examples are a game changer. I finally remember words because I see them used the way I'd use them in Bengali first.”
“The streak system kept me coming back daily for three months straight. My active vocabulary easily doubled.”
“I export every weekend to a spreadsheet and review on the train. Most apps lock that behind a paywall — here it just works.”
Free to start. Coins to grow.
All learning features are free. AI sentence generation uses coins so you only pay for what you use — no subscription required.
Start with bonus coins. Quizzes, streaks, exports — everything except AI generation.
- check_circleUnlimited words
- check_circleDaily quizzes
- check_circleStreak tracking
- check_circleExcel / PDF export
- check_circle~100 AI-generated examples
- check_circleNative-language translations
- check_circleCoins never expire
- check_circle~550 AI-generated examples
- check_circleNative-language translations
- check_circleCoins never expire
- check_circle~1200 AI-generated examples
- check_circleNative-language translations
- check_circleCoins never expire
Coins never expire. No subscriptions. Pay only when you need more AI generations.
Questions, answered.
Still curious? Sign up free — your welcome coins let you try every feature in under a minute.
Is LexiVault really free?expand_more
Yes. Adding words, taking quizzes, tracking streaks, and exporting your data are all free forever. AI sentence generation uses coins, and you get bonus coins on signup to try it out.
How does spaced repetition work?expand_more
We use the SM-2 algorithm: when you answer a word correctly, the time before you see it again grows exponentially. Wrong answers reset the interval to 1 day. The algorithm adapts to how well you actually remember each word.
Which native languages are supported?expand_more
Bengali, Hindi, Arabic, Spanish, French, Portuguese, Turkish, Urdu, Indonesian, and more. AI-generated example sentences come with translations in your chosen language.
Do my coins expire?expand_more
Never. Coins you buy or earn stay in your account forever, and you can use them whenever you need an AI-generated example.
Can I export my words?expand_more
Yes. Export your full word list to Excel, Word, or print-ready PDF anytime. Your data is yours.
Is my data secure?expand_more
Passwords are bcrypt-hashed, sessions use signed JWTs, and payments are processed by Lemon Squeezy. We don't store payment details on our servers.
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