KasusKnacker is a German grammar app built for deliberate practice. Instead of long explanations, it gives you targeted exercises that build grammatical intuition and muscle memory, so you use the right endings without stopping to think.

Drill deep into the four cases (dem, den, des, der), articles, possessives, prepositions, and adjective endings, with a built-in verb conjugator for hands-on practice. Round it out with vocabulary flashcards, a 260+ phrase phrasebook with audio, mini-games, and gamified progress (XP, streaks, leaderboards).

With 20,000+ exercises from A1 to C2, it's ideal for exam prep (Goethe, telc, TestDaF). Smart Review targets your weak points, Study Groups let you learn together, and the app stays 100% ad-free with daily free practice across web, iOS, and Android.