Ive owned the desktop and iOS app for a while and Ive been waiting for an apple watch app for a while since flashcards seem perfect for learning on your apple watch when youve got a few minutes of time on your hand (like standing in a line). So its been over a year and a half... The desktop app is really good, and Id be ready to pay for the iOS app if it had apple watch functionality but now Im looking around to change my flashcards app for one that works with the apple watch (and there are quite a few now). Its a pity, cause I really like mental case