Kana memorize iOS app
Kana memorize app includes both hiragana and katakana tables with each kana containing sound, strokes, mnemonics and tips and a flash cards game.
App store: https://itunes.apple.com/us/app/kana-memorize/id1184225723
Landing page: http://kana.nanvel.com
iTunes Connect stats:
~1 download per day.
Territories: USA, Japan, Indonesia, France, Singapore, China, Saudi Arabia, Israel, Mexico, Italy.