KasusKnacker: Practice German

New: Exam Training. Grammar tracks from A1 to C1 with telc-style gap texts and error spotting, plus a timed readiness test that shows which topics still need work.

Master German Grammar through Practice!

Struggling with German grammar mechanics? From Der, Die, Das and Cases to Prepositions, Possessives and Verbs, KasusKnacker is your dedicated training ground for mastering the hardest parts of the German language.

We focus on deliberate practice: targeted exercises with instant feedback and clear explanations that build your grammatical intuition and muscle memory.

Why KasusKnacker?

• 100% Ad-Free: Enjoy a distraction-free learning environment.
• Fair Freemium: Practice daily for free or upgrade for unlimited access.
• Exam Training: Grammar tracks from A1 to C1 with telc-style gap texts, word-bank tasks, error spotting and sentence rewrites. A timed readiness test shows which topics still need work. Useful when you're preparing for Goethe-Zertifikat, telc, DTZ or TestDaF.
• Targeted Case Training: Drill deep into dem, den, des, and der until it becomes second nature.
• Prepositions & Pronouns: Know exactly which case to use with every preposition.
• Possessives Mastery: Practice mein, dein, sein etc. across all cases.
• Verb Conjugator & Practice: Look up conjugations and practice verbs until they are automatic.
• Vocabulary Flashcards: Practice your German vocabulary with our new flashcard system.
• Phrases & Idioms: Learn common German phrases and idioms with flashcards.
• Article Mastery: Stop guessing genders. Practice Articles until they stick.
• Adjective Endings: Master the logic behind adjective declensions for every case.
• Phrasebook: 260+ real-life German phrases with audio across 15 everyday topics — doctor visits, banking, housing and more.
• Stories: Short, illustrated German stories with audio, dictation and comprehension questions — read and listen at your level.
• Mini-Games: Hangman, Falling Words, Sentence Scramble and a grammar RPG battle.
• From A1 to C2: 20,000+ exercises in hundreds of themed lessons, from your first articles to advanced grammar.
• Gamified Progress: Earn XP, build daily streaks, and compete on leaderboards.
• Daily Challenge: Compete daily, keep your streak alive, and see how you stack up.
• Study Groups: Create private groups, share a join code, assign lessons, and compete on a shared weekly leaderboard. Only the creator needs Premium.
• Smart Review & Bookmarks: Save difficult exercises, revisit them later, and review mistakes when they are due.

Whether you're prepping for an exam or just want to speak without pausing to think about case endings or prepositions, KasusKnacker gives you the reps you need.

Download now and start cracking German grammar today!

KasusKnacker is an independent grammar-practice app. It is not an exam provider or testing centre, and it is not affiliated with, authorized by, sponsored by or endorsed by Goethe-Institut e.V., telc gGmbH, the Federal Office for Migration and Refugees (BAMF) or g.a.s.t. e.V. Goethe-Zertifikat, telc, Deutsch-Test für Zuwanderer (DTZ) and TestDaF are trademarks of their respective owners. KasusKnacker provides focused grammar review, not complete exam preparation.

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