Memrise excels as a vocabulary acquisition tool, centered around a spaced repetition system (SRS) to optimize memorization. Its standout feature is the integration of thousands of short video clips of native speakers, which provides crucial exposure to authentic pronunciation and colloquialisms. In addition to official courses, Memrise hosts a vast library of user-generated content for a wide array of languages and subjects. However, it provides minimal explicit grammar instruction and limited opportunities for sentence construction or speaking practice, making it an excellent supplementary tool for vocabulary and listening rather than a comprehensive course.

Clozemaster is a language learning game focused on building vocabulary through mass exposure to sentences. The core mechanic involves filling in a missing word (a "cloze") in a sentence. It uses a spaced repetition system to re-test words and features a heavily gamified interface with points and leaderboards. Sourced from a large corpus of translated sentences, it's an excellent tool for intermediate learners to move beyond basic vocabulary and see words used in a wide variety of contexts, which can implicitly reinforce grammar.