I made a little updated version for myself with some changes for the buttons. Because now I absolutely can’t live without this script anymore 
- Buttons are displayed below the answer form instead of on top so that the content isn’t hidden by my hand (my Android device that I’m using just for this purpose is tiny and crappy…)
- There are two states for the buttons: either one large “Show Answer” button or two “Know”/“Don’t Know” buttons so that you don’t have to move your finger anywhere in case you got an answer correct
In case anyone wants to give it a try or reuse it somehow:
