Langsi is a vocabulary app that teaches you in context, not with flashcards: real sentences instead of isolated words, so you learn any language the way it's actually spoken. Unlike Anki, you don't have to build your own learning system — and unlike Duolingo, there are no games, leagues, or endless learning paths to distract you. You focus on what matters: understanding vocabulary, using it in context, and actually retaining it long-term.
Get ahead through context
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Your word gets placed into your personal learning system. Since you didn't know it yet, this word comes back again soon.
Your next repetition is automatically scheduled.
Every answer makes your word selection more precise.
Now let's anchor it with real examples.
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Listen closely to the word and sentences — pronunciation sticks best when you say it out loud right along with it.
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| Word | Transliteration | Meaning |
|---|---|---|
| ฉัน | chǎn | I |
| รัก | rák | love |
| แมว | mææu | cats |
| มาก | mâak | very much |
This is how Langsi breaks down every example sentence: word by word, with translation and transliteration.
And this is just the beginning — there's a lot more waiting in the full course.
Your Progress
Langsi always shows you exactly where you stand — and what's next.
Personal daily goal that you can adjust to your needs
Leitner repetition system makes sure nothing gets forgotten
Visible progress per word, category, and day
Downloadable daily summaries — perfect for continuing to learn with AI
Learn words and vocabulary with real example sentences instead of isolated vocabulary lists.
Mastery level per word, as a percentage — shows exactly how confident you already are with a word
Start free — no credit card. Upgrade anytime.
Free
Free · No subscription
One Language
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All Languages
/month · all future languages included
Langsi is an intelligent vocabulary app that helps you do more than memorize words — it helps you understand their meaning, pronunciation, and real-world use. The app combines vocabulary training with translations, audio, example sentences, pronunciation aids, and additional explanations. Repetitions are based on your personal learning progress, so you always practice the vocabulary that matters most to you right now.
Many classic vocabulary trainers focus mainly on linking a word to its translation. Langsi goes a step further. The vocabulary app connects words with example sentences, audio, pronunciation, and a structured breakdown of the language. You don't just learn what a word means — you learn how it sounds and how it's actually used in real sentences.
Langsi was built as a multilingual vocabulary app for many different languages and language pairs. It takes into account both the language you want to learn and your own native language, so translations, explanations, and learning content match your exact language combination. You can choose your currently available languages directly when you set up Langsi.
A translation alone is usually not enough to use a new word confidently. That's why Langsi shows you how a word is used in different example sentences and situations. This helps you build a real feel for meaning, sentence structure, and natural usage — turning a single vocabulary word into language you can actually apply.
The Langsi method combines several learning steps. You see a new word and its meaning, hear its pronunciation, encounter it in example sentences, and can analyze sentence structure in more detail. The word is then repeated according to your learning progress. This way, the Langsi vocabulary app connects seeing, understanding, hearing, remembering, and applying into one structured learning process.