모앗닷 is an educational app designed to help students study and practice English for their school exams. With over 1000 school-specific questions, more than 130,000 past exam questions, and 6 years' worth of evaluation institute questions, this app provides a comprehensive collection of English questions for students to practice. It also includes a wide variety of textbooks, supplementary materials, college entrance exam questions, and evaluation institute questions, totaling over 300 different types of resources. Additionally, the app offers mock exams and the latest school-specific questions to keep students updated.

The app offers various study methods to cater to different needs. Students can solve problems one by one and quickly check their answers, which is useful when time is limited or when they want to quickly verify their answers. They can also take full exams to assess their skills and see how well-prepared they are for their upcoming exams. The app also provides an error note feature, allowing students to review the questions they have attempted and reinforce their learning. This is especially helpful when students want to revisit questions, have trouble remembering the answers, or have limited time for review.