Vokabeln: Learn German is an AI-powered tool that assists users in learning German through flashcards and spaced repetition. With Vokabeln, learners can extract vocabulary from any text and utilize a spaced repetition algorithm to reinforce their understanding. The tool avoids gamification and childish exercises, offering a more mature learning experience.One of the key features of Vokabeln is the practice mode, where users can swipe to fill in missing words in sentences. These include text-to-speech functionality for pronunciation practice, customizable settings for the spaced-repetition algorithm, German to English practice variations, and more control over word collections. A demo account is available for trying out the app, and while login is required for actual usage, users have the option to sign in via email, Google, or Apple accounts.Vokabeln welcomes user feedback, bug reports, and improvement ideas, and encourages users to get in touch via email.