One screen. One problem.

K Math Master
Find your first mistake.

Solve on paper. Take a photo. See the first line where your handwritten solution goes wrong, then learn the steps to move forward.

Current problem library: Korean curriculum, Grades 7–12.

Example · Solve 2(x + 3) = 10

Your first mistake is in line 2.

Subtract 6 from both sides: 2x = 10 − 6.

Understand the step, then try again.

From a wrong turn to your next step

Upload a photo of your handwritten solution to find the first line where your reasoning went wrong.

Work through the steps behind a solution, then return to the problem.

Check what you understand and where you need more practice.

Practice the concepts you find difficult, one problem on each screen.

Parents can follow their child's progress. Weekly report texts require a Korean mobile number.

Challenge

Take on a collection of our most demanding problems, at the level of the hardest questions on Korea's college entrance exam (CSAT).

Available now: problems from the Korean curriculum for Grades 7–12. International exam courses are still in preparation.

Check the store for free trial eligibility

Subscribe through in-app subscriptions in the App Store or Google Play.

Pricing shown in your local currency in the App Store / Google Play