− | This is the open source Spaced Repetition SRS app. It may be usable for [[Tools for Cognitive Testing|Cognitive Testing]]. | + | This is an open source Spaced Repetition SRS app. It may be usable for [[Tools for Cognitive Testing|Cognitive Testing]]. Spacing is very useful in learning.<ref>https://www.gwern.net/Spaced-repetition</ref> |