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. Additionally, learners can explore how words are used in various sentence structures and gain AI-generated explanations on word meanings and origins.Vokabeln allows users to import texts and automatically identifies unfamiliar words, including conjugations and 'trennbare verben' (separable verbs). It also keeps track of the words users have mastered and provides collections and word frequencies for further learning.While the tool currently supports only English to German learning, there are planned features to enhance the learning experience. 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. Vokabeln also aims to integrate with additional resources such as royalty-free books, subtitles, ebooks, and song lyrics. Future plans also include a web version and the possibility of adding more languages.For a free trial period of 7 days, users can then subscribe to the tool for a monthly fee, the exact amount of which depends on the platform and location. 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.