OneLiner is an innovative AI-driven educational tool designed to help high school and college students improve their problem-solving skills in coding and mathematics. Unlike traditional learning aids that provide direct answers, OneLiner offers progressive hints that guide students towards discovering solutions on their own. This approach not only reinforces learning but also enhances critical thinking and self-reliance. The app tailors personalised insights and recommendations based on user interactions, providing learning assistance to address specific weaknesses. Our unique feature set makes OneLiner an invaluable companion for any student aiming to master complex subjects.