Difficult words return sooner
If a word is hard to remember, it should appear again quickly. This creates more chances to rebuild the memory before it fades.
Spaced repetition helps learners spend more time on words they forget and less time on words they already know.
Reading a vocabulary list once often feels productive, but many words disappear from memory quickly. A spaced repetition system brings words back after a delay, so each review happens closer to the moment when forgetting would normally begin.
If a word is hard to remember, it should appear again quickly. This creates more chances to rebuild the memory before it fades.
If a word is easy, reviewing it again immediately is usually wasted effort. Longer intervals keep practice efficient.
ahzo.de prioritizes cards that are due and keeps sessions compact, which makes daily review easier to maintain.
After flipping a flashcard, the learner rates recall quality. That rating controls when the card comes back.