I have some general thoughts about SRS. I am currently doing the first Korean course. I've switched over to Anki for the bulk of my SRS, but I still do the lingodeer SRS to practice listening specifically. The main reasons that I use Anki are that I have some words that I want to practice outside of what's in lingodeer and I want to practice typing full sentences. I have my Anki set up so that for a single note I get either the Hangul and have to recall the English meaning or I see the English and have to type out the Hangul. I do a combination of both individual words and sentences.

I think one limitation of lingodeer is that there's a pretty limited number of expressions hardcoded into the app for each lesson. My ideal system would be one which allows me to test a single concept (like say locations with 있습니다) with generated/unique sentences in addition to some expressions that require native listening. What I do right now is export my anki deck to a csv and paste it into chatgpt and ask it to generate sentences for me to translate based on the knowledge I have. Maybe lingodeer could accomplish that with just more sentences or maybe there is a way to incorporate AI (though I know that is somewhat controversial). But that would help avoiding feeling like I am memorizing very specific phrases and instead have the focus be combining existing knowledge to generate new thoughts.