Great work, I've been searching for something like this for a while, and never really liked the UX for Anki. I love the UX, very clean and easy to use. Tutorial / intro was the perfect length, gave me a quick run down on how to use it without taking too much time.

I almost skipped over this because I didn't know what "spaced repetition system" was. My only suggestion is to market it around what benefit the user will get out of it, and not SRS / or the algorithm behind it.