I sometimes miss the "sure" button

[eternal-sorrow]

I'm pretty sure I tap the correct button, but because the buttons are so small, I can't be 100% sure. Sometimes I press "sure" near the correct answer, but the app registers as if I pressed "maybe" near the answer one row up from the correct one. This happens rarely, but is very annoying.

[blastrock]

There isn't much room on the screen to make buttons bigger. I recommend you use the single button mode in the settings, that's what I do.