There is an app muse, who to tell you the truth is a bad app but has a very unique feature and that it has infinity amount of flashcards on it that they can become bigger and smaller and you can even add a card inside another

What am asking for is simple a flashcard that you see its containt and can controle its size that when you want to use you can make it bigger, this flashcard has an infinitesimal size or at least the size of a typical page

This feature is like a game-changer for most of us
Thanks and sorry for the inconvenience