Review is a to-do list that schedules revision based on the principle of spaced repetition. Reviews are rescheduled once completed based on their difficulty.
Spaced repetition is based on the ideas of Hermann Ebbinghaus, who created the "forgetting curve".
Data safety
Safety starts with understanding how developers
collect and share your data. Data privacy and security practices may vary based
on your use, region, and age. The developer provided this information and may
update it over time.