Well, Anki is also a spaced repetition program/app. The details are quite different though. Mainly, Ginseng gives direct control over the review interval: So no

Well, Anki is also a spaced repetition program/app. The details are quite different though. Mainly, Ginseng gives direct control over the review interval: So no easy/hard/etc, but rather directly manipulate the interval. Also there are no static decks, it has a clean data format, no reliance on the proprietary server backend, native markdown etc. I'm an excessive Anki user, so this is basically my dream version of a SRS program.