Original math problems, solved competitively. Ranked Runs, a Weekly Contest, and a Skill Rating that measures what you can actually do. One rating ladder from Grade 9 through university: number sense and algebra, quadratics and trigonometry, functions and sequences, advanced functions and calculus, contest problems in the style of high school math competitions, and first- and second-year university topics. Free to play.
SolveOn+ adds topic analytics, targeted training, session history, rating over time, contest-style sets and worked solutions — never a competitive advantage.