Reviews Rocks, With Two Exceptions

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April 18, 2019 edit: Now rebranded as iKnow, the service is no longer completely free.

In a nutshell: is a free, web-based flash card service. If you crack the nutshell open to get a look at the details of how it works, though, it’s far better than that. Here, let the official video introduction explain what I mean.

Note: The video was taken down after the rebrand. They don’t seem to have a video anymore, but the company has a features page.

Screen Shot 2013-08-04 at 2.29.23 PM is not the only software based on spaced repetition. It does, however, have a few advantages over the other ones I’ve tried.