MemorizeItForever helps you to memorize every Word, Phrase and subject for long-term.
It is useful to memorize new words in new language you trying to learn.
The algorithm is based on Leitner system. This system is explained in Wikipedia with following sentences: "The Leitner system is a widely used method of efficiently using flashcards that was proposed by the German science journalist Sebastian Leitner in the 1970s. It is a simple implementation of the principle of spaced repetition, where cards are reviewed at increasing intervals."