I don't know. I just tried to briefly check it out again. I'm sure I could be giving it a fairer chance.

Clearly, millions of people are benefiting from this app.

I'm just finding the features and interface very bombarding. And, the sheer number of screen taps just to study the flash cards in the manner that I'd like (and even then, not fully within my perceived control) is pretty repelling.

Thank you for pointing that out that feature. It might help eventually with conversion.