Spaced repetition is how I've learned Spanish, French, and Italian in the last 3 years and I couldn't find tools that have the languages that I want to learn in the future, so I built Lexical.
The link goes to my White-Paper describing the language learning philosophy behind Lexical if you just want to try it out you can click "Get Started" at the top of the page. To really experience Lexical at it's best you'll need an account (sorry guys) but I've tried to make it as easy as possible.
I'm a big fan of Hacker News and am looking forward to your comments and hopefully even some beta users.
Here are some old HN posts that inspired my app and white-paper.
Learning is remembering https://news.ycombinator.com/item?id=32982513
Kanji only requires 777 words https://news.ycombinator.com/item?id=20721736
Most of language learning is temporary heuristics https://news.ycombinator.com/item?id=44907531
Duolingo sucks https://news.ycombinator.com/item?id=45425061
