SKUL is a free mobile application developed by INTERIA.PL. It offers verified solutions to exercises from textbooks, exercise books, and problem collections for students in grades 4-8 of primary school and grades 1-4 of high school (lyceum, technical school). Each exercise comes with a detailed solution and an explanation prepared by a teacher.

The app covers subjects such as mathematics, chemistry, Polish language, history, biology, physics, geography, nature, and social studies at both basic and advanced levels.

SKUL is a great tool to double-check your homework solutions. Can't solve a problem? Take a look at the explanation to understand the problem better.

In addition, the app provides solved past exams and eighth-grade exam papers for mathematics. More subjects are already in preparation!

Using SKUL is completely free, and there are no ads in the app or on the website. No account creation is required either.