Kana Sensei is a supplementary app to Nihongo no Sensei, and is designed to help students of the Japanese language (especially beginners) learn the Hiragana and Katakana– the two phonetic syllabaries used in Japanese. Your memory progress for each item is tracked and displayed at the end of each multiple choice quiz, and on the study screen so that you can prioritize your study time. iCloud keeps your progress synced across all of your devices, so you can seamlessly switch between your iPhone, iPad, or iPod touch at will.
The free version of this app is ad-supported, but is otherwise identical to the paid version of Kana Sensei. If you wish to upgrade to remove the ads, you may do so at any time. Your progress will not be lost as long as you have an active iCloud account, since both applications sync progress to your iCloud account.