I have now been using skritter for a few days, and I got to say that I just like it more and more. I tried it on my phone earlier today and it worked surprisingly well, so kudos the creators!
Also, I have a suggestion. Would it be possible to add the word class of what ever word you are practicing?
It wouldnt have to be anything advanced, just like a "动" for 动词 or "副" for 副词, 名 for "名词" etc.
You could put it before the translation, like:
__ __ (庆祝)
qing zhu
动:To celebrate
今天我们来____一下!
or for a word that could be used as more than one word class:
__ __ (高兴)
gao xing
形:happy.
我今天感觉特别____.
动:Be happy to.
你不高兴干就拉倒。
I believe it could help a lot when you're trying to understand how to use new words.