Abacus by LK: Abacus by LK is a math learning app designed for kids to develop their arithmetic skills through the use of an abacus. With its interactive and intuitive interface, children can learn the basics of addition, subtraction, multiplication, and division while having fun. The app uses visual and audio aids to help children understand and solve math problems, making it an ideal learning tool for kids who struggle with traditional methods. Abacus by LK is perfect for parents who want their kids to learn math while having fun.