This app is for learning basic Japanese writing.
It has great reviews and lots of downloads.

•includes cards for learning Hiragana and Katakana
•almost 900 of the most common words for beginners
•get a card right and it's taken out of the drill
•get it wrong and it's shuffled back in
•learn cards 10 at a time
•test yourself Japanese to English, or English to Japanese
•you may choose which individual cards make up each deck

Practise every day and feel the excitement as your vocabulary grows.