How it works
Add any content
Paste a URL or upload a file. OpenCrux transcribes and syncs the text to the audio in seconds.
Study in context
Follow along word by word. Tap anything to get instant translation, CEFR level, and grammatical breakdown.
Review until fluent
Your vocabulary deck grows automatically. Spaced repetition surfaces each word right before you forget it.
Built for serious learners
A curated catalogue of German podcasts.
Six native podcasts pre-wired — slow news for beginners, native-pace political analysis for advanced learners — plus a fresh Daily Surprise per CEFR level. One click, the latest episode becomes a lesson.
Vocabulary captured in context.
Every word you look up is saved with the exact sentence it came from. You never learn from a dictionary — only from real content you encountered.
Spaced repetition that actually works.
SM-2 algorithm schedules every word at the exact moment your brain is about to forget it. Two directions: recognize it, and produce it.
An AI tutor who knows your content.
Ask anything about what you just heard. Your tutor corrects your German, explains cultural context, and adapts to your CEFR level — all with the full transcript in mind.