Also, while I am here. You guys should totally add a way to batch select things from the lists so that you can mark multiple things as “mastered” or “add to reviews” at the same time. This would be especially useful for vocab decks.
For example, if someone wanted to make sure they knew everything in the N5 vocab deck, but they already know more than half of it when they start. If they wanted to “complete” the deck, they would have to go through one by one and click on each one they already know to mark as mastered. It is really slow.
If you made it so there were little checkboxes off to the side, that person could click on like 50 checkboxes and mark them all as mastered at one time. Batch processing.
Low priority request, just trying to help out your UI.