At its most basic level, a Spaced Repetition System (SRS) is a to-do list that changes according to your performance. If you can remember that pollo means “chicken” after a two-month delay, then your SRS will automatically wait four to six months before putting pollo back on your to-do list. If you’re having trouble remembering that ropa means “clothing” for more than two weeks, your SRS will put ropa on your list more frequently until it sticks for good.
