I have to say after reading this site and "testimonials like this coming soon!" I am no longer scared that AI will fill the internet will junk. Humans will always be better at generating junk. I'm sorry, but this is not a compelling site at all to me, it feels like "sprinkle ai on whatever" bukkake.
I feel like this post should be deleted for obvious self-advertisement. Anki is the golden standard for spaced repetition learning with a rich plugin ecosystem, and allows everyone to retain even more information with the recent introduction of the FSRS algorithm. RepIt is... I don't know? RepIt says it's better, source: Trust me bro. Better how? Who knows.