[fouric]

I found Anki to be easy to pick up for my simple use-case, and the interface isn't any worse than most other tools out there.

Yes, features aren't the only reason why people use a product, but some people (me, and many others here) do mainly use a product for its features. The lack of a comparison is somewhat of an oversight.

For that matter, there's no UI comparison either - no video showing a side-by-side diff between Zorbi and other tools (Anki, Mnemosyne, Quizlet, etc) - which, all in all, makes it a hard sell for most people who are already using an SRS, and I'm pretty sure that Quizlet has much more momentum and can acquire new-to-SRS users faster than Zorbi can.