Thanks for your opinion on this. I use Mac's built-in dictionary quite often. Guess the system provides some way to catch the look-up event, though then I also

Thanks for your opinion on this. I use Mac's built-in dictionary quite often. Guess the system provides some way to catch the look-up event, though then I also need to think about the notification part. Anyways spaced repetition sounds like a simple idea that could do the trick. The point of doing it automatically in the vocab learning (for foreign languages) case is so that you don't need to decide whether you've search a word before.