I didn't realize the creator of Skritter was on HN! Just want to say that I've really enjoyed your app, and it's helped immensely with trying to learn Chinese
Really glad to hear that! It's always awesome to know that the product is helping people.
Another one here - was the only app/tech I needed for practicing other than kindle and a dictionary app. Replaced Sudoku and other puzzle games as my train time-killer when I still commuted perfectly when I didn't feel like reading.