A quick tip for smartphone users based on a question I received recently.

You can scroll the flashcard page to reveal the Pass/Fail counts, as well as the END button!

Click/tap the END button to end a review session. Any due cards that are left will show up when you start the review later that day. In other words, you don't have to review all the due pile in one sitting.

I realize this is not very obvious and maybe I'll get around to redesign the flashcard review layout on smartphone. The END button should probably go to the top row, and the "exit" button should probably disappear after reviewing one card. Until then I hope this little tip helps!