I never got try the algorithm - I simply don’t get the UI in spite of all my best efforts. I’m looking for a wanikani like tool, with the same srs , and same excellent and simple ui.
I’ll have a look at supermemo ( I don’t mind paying ).
I make cards on a linux desktop and sync to ankidroid.
Really one of my all time favorite pieces of software. I would have given anything to have had this 30 years ago in school.
www.mochi.cards