手書きでひらがな練習帳-書いて覚えよう- is an iPhone application developed by Yusuke Ishino. It falls under the category of Education & Reference and is available for free.

The app allows users to practice writing hiragana, the basic phonetic script used in the Japanese language, by using their fingers or a stylus. Users can also register their names to practice writing them. The app provides feedback on whether the characters are written correctly or not, and users have the option to mark all answers as correct.

In addition, the app offers a feature called "Seiseki" where users can view their performance records during the accuracy judgment. This can be helpful in identifying which characters are more prone to errors.

The app also includes other features such as the ability to toggle the accuracy judgment on or off and the option to delete performance records. Overall, 手書きでひらがな練習帳-書いて覚えよう- provides a convenient and interactive way for users to practice writing hiragana.