As me, im using Japanese phrasebook and jlpt words..its an app that allow you to memorize the words and also help in pronunciation.. you can find it in play store.. I'm not sure with apple store but you can find it by searching towards " Japanese learning " key point.. but for writing.. its better if you print out some of hiragana n kana table and try to write it by yourself..you also can find writing sheets in google.. gambatte ne!!

http://itunes.apple.com/tw/app/id455933634 try this one

I like "Memrize", which is a free app. It doesn't do stroke order for the kana, but if you just want to work on recognition, Memrize is what I suggest.

I think writing them down on paper is the best. You don't need app to learn kana, you need paper, pen and something that shows the stroke order. That's just my opinion. For stroke order, try this: http://easyjapanese.org/write_hiragana.html And notice that if you learn the wrong stroke order, it will be difficult to learn the right one.