MosaLingua is built around a highly effective Spaced Repetition System (SRS) designed to help you learn and retain a large amount of vocabulary efficiently. The app prioritizes the most useful words and phrases to accelerate practical knowledge. While its core is flashcards, the platform also includes dialogues, articles, and other resources to add context. It is a powerful tool for learners dedicated to building a strong vocabulary foundation, though they will need to look elsewhere for structured grammar lessons or extensive conversation practice.