[treetalker]

It's Genius.app, an old flashcard app for Macs.

Author discusses/compares Duolingo and Anki. Anki is disapproved for lack of precise right/wrong feedback.

Repository of updated code: https://github.com/shawa/genius

[adastra22]

I think OP is confused about how Anki works. It can totally be used the same as this tool if you just hit '1' for things you got wrong and '3' for things you got right. '2' and '4' are more power user levels of control.