I designed a very similar spaced-repetition algorithm flashcard learning app for the Kindle (screenshots here: http://keminglabs.com/#/kindle/ http://keminglabs

I designed a very similar spaced-repetition algorithm flashcard learning app for the Kindle (screenshots here: http://keminglabs.com/#/kindle/ http://keminglabs.com/#/kindle/ ). It's in Amazon's review process at the moment, but if you have a Kindle and want to test it out I can get you a dev copy. Tenjack---drop me a line if you want to chat about collaborating on some of this. We got our definitions from Wiktionary as well, but we're looking around for other resources.