The Deutsch perfekt lernen app is a complete language course that provides the foundation for learning German.

It will help you with the following areas:

• Vocabulary: learn to speak German with exercises for reading, listening and writing
• Grammar: learn to speak German with exercises for identifying and combining grammatical elements, verb conjugation, tenses, and declensions
• Vocabulary in context: learn to speak German with exercises for identifying and using vocabulary in different ways, such as a noun, verb, adjective, or adverb
• Useful phrases for daily life: learn to speak German with exercises for identifying and using useful phrases in daily life and in talking to foreigners

The app itself is available for free.