Every now and then I get asked by a friend or acquittance how many characters I know. My answer is always a pure guess as I haven't kept count. But I realized that—because I've been using Pleco consistently ever since I started my Chinese studies—about every Chinese character I've learned is in my Flashcard database. As the total amount of flashcards is already shown in Pleco, I think it would be rather easy to make a function which also shows the number of unique characters these flashcards are made up of. I'm sure such a small but interesting function would be greatly appreciated.