PitterPatter: English Vocab

Ever shelved a vocabulary book with the first thirty pages black with notes and the rest still spotless? The problem isn't willpower. It's order. Nobody can tell by feel what to review and when. PitterPatter is an English vocabulary app that works it out for you: 13,488 words from CEFR A1 to C. Learn them in your own language, with menus and meanings in Korean, Japanese, Chinese (Simplified or Traditional), Vietnamese, Thai, Indonesian, Spanish, or French. All you have to do is today's cards. “What should I study today?” The app picks for you. It starts with the 1,067 words of A1, then runs through A2, B1, and B2 to C, in 272 Days of 50 flashcards. “I saw it once. Why didn't it stick?” That's how memory works. In 1885, Hermann Ebbinghaus drew the forgetting curve: two thirds or more of something new is gone within a day. But recall it right before you forget, and the curve flattens.…