Comment by jarrett-ye

What does the 'Free' mean in the name?

The algorithm (FSRS) supports reviewing in advance or delay. It's free for users to decide the time of review. And it will adapt to the user's memory.

Meanwhile, spaced repetition is one essential technology to achieve free learning.

FSRS runs entirely locally and has no risk under others' control.

source: https://github.com/open-spaced-repetition/free-spaced-repeti...