What is spaced repetition?

Spaced repetition is a scientifically proven learning idea: when you review a piece of information right around the point you'd almost forget it, you remember it far more durably.

How it replaces classic repetition:

• Instead of reading the same section ten times in a row, you see it again the next day, then three days later, then a week later.
• As your memory holds, the gaps grow wider; when you start forgetting, the gaps narrow.

How Vunolin applies it:

• It tracks how confidently you handle each question in your quizzes.
• It uses that signal to place weak concepts into upcoming lessons earlier than the strong ones.
• You spend more time on things you nearly forgot and less time on what you already know.

Plan difference:

• Pro, Family, and Teacher use automatic spaced repetition.
• Free uses sequential repetition without adaptive scheduling.

For how the progress metrics work, review the Progress system article.