Clozemaster Labs
Experiments in getting fluent faster.
Things we're building alongside Clozemaster. The ones people love grow up into the app.
Der, die or das?
German noun gender practice
The 2,500 most common German nouns, most common first. Three articles, one fast decision at a time, until der, die and das stop being a guess.
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Der Die Das Runner
German noun gender, at speed
Three lanes - der, die and das - and a German noun rushing toward you. Get in the right lane before it arrives, then beat today's leaderboard.
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Le La Runner
French noun gender, at speed
Two lanes - le and la - and a French noun rushing toward you. Get in the right lane before it arrives, then beat today's leaderboard.
beta
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Travel Phrases
Phrasebooks you can practice
The essential phrases for a trip, from Wikivoyage's volunteer-written phrasebooks. Hear each one, then learn them in quick rounds with spaced repetition.
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Infinite Radio
Original songs at your level
An endless station of AI-generated songs, every lyric written at one CEFR level. Read along with synced lyrics and translations, and save the lines you want to keep.
Your idea here
A language, a grammar topic, a tool you wish existed. Tell us what you'd want next and it might be the next card on this page.
What should we build next?
Every suggestion gets read. Leave an email if you'd like to hear when it ships.