Genius is a free educational application designed for children who want to practice math while unlocking their Android devices. The app allows users to select between addition or multiplication problems, with the range of numbers going from 0 to 100. The app also features a star collection system, where children can earn stars for every 1000 correct answers.

The lock screen displays a math problem, and the user must solve it correctly to unlock the device. The app keeps track of the number of correct and incorrect answers, as well as the number of stars collected. Genius is a great way for children to practice their math skills and have fun at the same time.