Avokado VS AnkiDroid

Kanji Book - Learn Japanese online with kanji mnemonics. Study all of the jōyō kanji with the best spaced repetition system. It's easier and better than any flashcard app.

Anki - Anki is a program which makes remembering things easy. Because it's a lot more efficient than traditional study methods, you can either greatly decrease your time spent studying, or greatly increase the amount you learn.

Quizlet - Quizlet allows you to review and create flashcards for a variety of subjects, such as math and reading.

LaTeX Cards - The mobile app to create cards to learn your formulas and theorems using LaTeX.

Memrise - Learn a new language with games, humorous chatbots and over 30,000 native speaker videos.

LearnObit - A tool for your learning, like Anki & Workflowy in one