"Arithmetic Ninja - Addition and Subtraction Volume" is an engaging educational application designed specifically for children who might find traditional study methods less appealing. This app transforms the process of learning addition and subtraction into an entertaining game, ensuring that kids remain captivated while they enhance their arithmetic skills.

Perfect for reinforcing what they've learned in school, this app provides a safe and enjoyable platform for both parents and children. The game is structured around iterative learning, which ensures that children can steadily build their calculation abilities through repeated practice. The difficulty level gradually increases, making it accessible even for those who initially struggle with math.

One of the unique features of this app is its card collection system. By successfully completing stages or passing reviews without errors, players can collect various cards. This gamification element encourages children to engage more deeply with the content, aiming to accumulate a diverse collection of cards. Additionally, there’s always the thrill of potentially obtaining a rare card, adding an extra layer of excitement to the learning process.

Parents can monitor their child's progress by tracking the number of questions answered, the accuracy rate, and the number of mistakes made. Achieving milestones, such as answering 1000 questions correctly, rewards players with special cards, motivating them to keep pushing forward. The app supports up to three players, allowing siblings to compete or collaborate without conflict, each with their own profile.

To further incentivize daily engagement, the app offers a daily bonus card at 8 AM every day. This feature encourages consistent use, helping children develop a routine of practicing arithmetic regularly. With characters like Kazumaru for boys and Kazuha for girls, the app adds a touch of personalization and fun, making the learning experience more immersive.

In summary, "Arithmetic Ninja - Addition and Subtraction Volume" combines education with entertainment, providing a dynamic and effective way for children to improve their mathematical skills in a playful and engaging manner.