Units across categories like length, mass, data, area, and temperature. Select from numerous units within each category. Save frequently used conversions. Share results via copy or email.
Learn Japanese with spelling quizzes, multiple-choice questions, and a time-based game mode. Test knowledge of names, locations, capitals, and flags. Access a list of all 47 . Available in English, Japanese, and 3 other languages.
Learn mental arithmetic through 59 lessons on addition, subtraction, multiplication, division, squaring, and verification. Practice with timed training sessions and compete with friends via Game Center. Track progress and improve calculation speed.
