I sometimes find it hard to read the pinyin when doing definitions etc on my phone (using the website, not the app). The fact that the pinyin is written with (light grey text) on a white background does not help. Would it be possible to add a customization option where you can change color/size of the text on various parts of the card?
I run into the same problem just opposite when I want to add a sentence etc, the characters are too big and does not fit if there are too many of them. An option to change these settings would really help a lot!