Doomsday Algorithm Trainer

"Doomsday Algorithm Trainer" is a fun and engaging app that helps users learn and master the Doomsday Algorithm. Through simple assignments and practice modes, users can calculate the day of the week for any given date and impress others with their mental math skills. The app features a daily reward system to encourage consistent practice and offers both training and competitive modes. Completely free and ad-free, this app is designed for users of all ages to enhance their cognitive abilities.