Lexifun. AI vocabulary trainer
Name any topic and the collection writes itself — phrases, not word lists. Then you have to say them out loud.
Type a topic — “restaurant conversations in Spanish”, “business English for meetings”, “dolphins teaching calculus” — and Claude writes the collection: living phrases rather than single words, each with a translation, an example, and an emoji anchor to hang it on.
Then the collection stops being something to read. You cover the translation, say the phrase out loud into the microphone, and the app listens to how it came out.
Claude curates 20 natural, idiomatic phrases with context, translations, and visual emoji anchors to make vocabulary stick.
Real language, the way real people speak it.
Key Architecture
Claude AI Generation
Curated vocabulary sets generated on demand with grammatical accuracy, natural idioms, and usage notes.
On-Device Speech Verification
Microphone input is processed locally with low latency to give instant syllable-by-syllable feedback.
iCloud Sync
Your collections, mastered words, and custom topics stay in sync across all your Apple devices automatically.
Offline Practice
Saved collections and audio recordings work fully without an internet connection — learn anywhere on the go.
Czech Vocabulary Collections
Ready-made topic sets for Czech learners — open directly in Lexifun:
Subscription
Free tier — create limited collections each month, full access to core study modes and speech verification.
Pro — unlimited collection generation, advanced CEFR level customization, and priority AI model access. Managed securely through Apple's App Store.
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