This app is designed for children who don't have a phone (like me) but have an Apple Watch. Sometimes, I forget to bring my account book, and when I want to use the Apple Watch to keep track of expenses, there isn't a good bookkeeping app. Many apps require a phone to use, and some lack editing and deleting features, so I decided to develop this app.

The name "9歲記帳" is because it's meant to teach bookkeeping from the age of nine, and also because this app is created by me, a nine-year-old. The app features expense tracking, displaying expense records, editing and deleting entries, adding notes, and categorizing expenses.