The A2-B1-Beruf app is an excellent resource for anyone who wants to learn German for free. The app is easy to use and can be accessed offline, making it convenient for users who want to learn on the go. The app is part of the vhs-Lernportal, which offers free German courses at levels ABC, A1, A2, B1, and B2. These courses help build your linguistic abilities systematically, and regular tests help you track your progress.

Overall, A2-B1-Beruf is a great app for anyone who wants to learn German at their own pace and for free. It is an excellent resource for beginners and intermediate learners looking to improve their language skills.