Thanks Ernie for publishing this brilliant app. Its simplicity but nevertheless gigantic feature set make this hands down the best flashcard app available.
One feature would be nice however and hasn't been implemented as of yet: Push alerts reminding the user about what to study at what time. Using the logic behind what card of what deck to show at what time could certainly be used to remind the user via push alerts that another study session is due. I'm convinced that this would optimise the learning process even further. What do you think?