Spaced repetition is a cognitive learning technique where review intervals expand exponentially as knowledge is reinforced. Reminda automates this entire process based on the proven SM-2 algorithm.

When you review a flashcard or memory prompt, you rate your recall difficulty:

• Again: The concept was forgotten. Reminda will present it again within 10 minutes.

• Hard: You remembered with significant effort. Interval increases slightly (+1.2x).

• Good: Perfect recall with normal effort. Interval expands optimally (+2.5x).

• Easy: Instantaneous recall. Interval expands significantly (+3.5x).

By spending just 5-10 minutes daily reviewing items due in your queue, you lock in long-term memory retention of 90%+ without hours of inefficient re-reading.