i'm using parley, and i like it, but i think it lacks a little thing that i like to use in that.

i like if in the "practise" page, when you choose what lesson you want to study, aside of each lesson, with the number of items and the percentage reached, there is also another information, that is: when was the last time i studied that lesson (completely), so i can choose to re-study when i see that lesson was studied a long ago.
becasue otherwise i study only new lessons, or the lessons that i see that have a very low level of percentage, but doing this i miss the lessons that at the beginning i've done a lot, and they stay at a high level, but if i do now i discover that i forget aybe 50% of that!
(i hope to not be unclear in what i tried to explain)

i know that are other features like expiring cards, but i'd like this way.

if someone of the programmers could that will be great, i think (but i'm not able to write program, so i don't know) it'll take a very little effort to write this little add to the program for the programmers.

so, thanks in advance!

In general, feature requests should be made either in the KDE Brainstorm on this forum or on the KDE Bug Tracker at bugs.kde.org