Thanks for putting this out . . . trying to get closer to a replacement of the Nintendo DS Kakitori-kun program. There should be an easier way to erase and retry. As it is, you have to shake the iPhone pretty hard to get it to register that you want to erase. Maybe a double-tap? See if you can add a way to simply move on to the next kana without having to go back. And perhaps there could be a way to practice kana (and later, kanji) without tracing. I'm looking forward to seeing what iRoha plus will be like, if you're following the same model of iMiao/iMiao+. Best of luck as you continue developing this. Certainly worth the download.