TreoCentral reviews SuperMemo "A desktop flashcard app has it's advantages, but nothing beats the portability of good old fashioned index cards. So it only makes sense to have a handheld version of SuperMemo. If you have some small window of time when you're not at the computer, you can put it to good use by expanding your knowledge.
I've been using SuperMemo for Palm since the Palm III, longer than I've been using the desktop versions. The method and the app really do work as advertised, but it's not for everyone. Using SuperMemo requires more discipline than index cards. Since spaced repetition means that the app determines which cards you study each day, you can't select them yourself. You might feel like reviewing certain cards that aren't scheduled to be reviewed for several days, so patience is required. In spaced repetition, the optimum review time for a card is just when you're starting to forget the item - when your likelihood of answering it as a test question drops to 90% according to the forgetting curve."
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