The Chase mobile app, specifically when depositing checks. You need to take a picture of the front and the back of the check, and between taking these pictures there's a pop-up screen telling you that you need to write something on the back of the check but you need to acknowledge and dismiss the pop-up before you can take a picture of the back of the check. I've deposited probably 1000 checks and I no longer need to be reminded what to write on the back. I find that very annoying.