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What is FSRS Retention and which setting should I use?

What FSRS Retention means

If your deck uses the "FSRS" review mode, the "FSRS Retention" setting controls how aggressively AlgoApp tries to keep material fresh in memory.

Higher retention means:

  • more frequent reviews
  • shorter intervals
  • lower chance of forgetting

Lower retention means:

  • fewer reviews
  • longer intervals
  • lighter workload

Available options

  • "Light (85% retention)": longer intervals and fewer reviews. Best for casual study or lower-priority material.
  • "Balanced (90% retention)": the standard recommended setting for most decks.
  • "Intensive (95% retention)": more reviews and shorter intervals. Best for high-stakes material.

How to change it

  1. Open the deck.
  2. Open the deck's settings.
  3. Find "FSRS Retention".
  4. Choose the option you want.

Recommendation

Start with "Balanced (90% retention)" unless you already know you want a lighter or more intensive study workload.