CogniCheck makes it easy for anyone to keep track of their brain health using the most accessible technology: phone calls with Calista, our friendly AI voice agent. Memory and thinking problems often begin years before anyone notices them, but current brain health testing requires expensive clinic visits or web-based puzzles and quizzes that demand tech literacy and are time-consuming. By the time most people realize something is wrong, it may be too late for the most effective treatments. We transform brain health monitoring into friendly phone conversations that you can take anywhere, whether at home, work, or on the go. Calista calls you regularly for casual conversations that feel like talking with a friend. Behind the scenes, we analyze how you speak, the words you choose, and your conversation patterns to spot subtle changes that could signal early cognitive decline. You receive easy-to-understand monthly reports that you can review yourself or share with your doctor and family. CogniCheck works with any phone and requires no apps or technology skills. We serve anyone interested in regular checkups on their brain wellness, including healthy older adults who want to age well, athletes concerned about head injuries, and those tracking mental health changes. Our early detection approach helps people take action sooner, when treatments work best and quality of life can be preserved longer.