The SRS algorithm uses scoring prioritization instead of intervals and I've found it to be more optimal than Supermemo/Anki.
I was an Anki desktop user for over 8 years, but I always became overwhelmed by the number of reviews due that would accumulate if I didn't stay active with the app almost every day (review hell). I've found the priority SRS model much easier when studying in small chunks (5-10 minutes at a time, 2-3 times a day).