Math and reasoning practice, built to feel like a contest instead of a chore.
About SumClash. SumClash started from a simple complaint: practice questions are boring alone and forgettable in a classroom. Put a clock, a score and a real opponent around the same question, and people stick with it — a player chasing a rating, a school running an exam, a guardian keeping an eye on both.
What we actually built this around
Practice works better as a contest
A worksheet doesn’t know if you’re paying attention. An opponent does. Every duel, live session and timed round is built around that — a clock, a score, someone to beat.
A guardian gets to stay close, without hovering
Linking a child’s account is opt-in and reversible. What a guardian sees is match history and exam registration — not a surveillance feed.
A school shouldn’t need an IT department to run an exam
An organization gets its own portal — question banks, grading, results, certificates — built so a teacher can set up an assessment in minutes, not a procurement cycle.
See it for yourself
Create a free account, or jump into a live game right now with just a nickname — no install, nothing to set up.