Hey not to distract from OPs post, but I wanted to get into SR for a while, and your "what is your algo" question aligns with my line of thinking when approaching new methodology.

Could you please share your SR tech stack? Are there good apps etc., that can make the process a bit easier? The pen-and-paper approach I used in uni for learning kanji / new languages has scarred me somewhat, so I am eager to try something tech-heavy.