Yeah, that sounds good. “With Anki, you can remember more while studying two times less!”
…nevermind, that still sounds like a bad shampoo commercial. But maybe I’m just too nitpicky
EDIT: “With Anki, you can remember more than with traditional studying methods while spending 40% less time studying!” is decent, though a bit too lengthy. Btw, we should keep this in mind: Humans Actually Have an Irrational Preference For Round Numbers : ScienceAlert
We should also somehow make it clear that with Anki you can remember things forever. Well, assuming you do your reviews diligently, but still.