Flashcards Deluxe is an easy to use, yet powerful flashcard app which you can use to study just about anything you want. I use this app for my own Chinese studies, and am constantly improving it to make it better for myself and others. Amazon: https://www.amazon.com/OrangeOrApple-com-Flashcards-Deluxe/dp/B00DXIC4R8 App Store: https://apps.apple.com/us/app/flashcards-deluxe/id307840670 PlayStore: https://play.google.com/store/apps/details?id=com.orangeorapple.flashcards