Aries AI

Aries AI is a free, browser-based AI tutor that teaches mental arithmetic through the abacus method. Four modes: an interactive visual abacus, oral practice (the app speaks number sequences and you keep the running total in your head), structured formula lessons (Big Friends, Small Friends, Combination), and a conversational AI tutor powered by OpenAI. Built solo by an 11-year-old from India. Currently desktop and laptop browser only.