1號課堂-提升自我的學習平台 is a free Android education and reference app developed by 1시간마트. The app has been awarded the 2020 App Store Editors' Choice and has also been recommended by various mainstream media outlets, such as Yahoo Technology Channel, Villagers Evening News, Electric Otter Girl, Blog Lai Okapi, Adi English, among others. With over 80 famous teachers and 210,000 netizens, the app offers users a systematic and efficient way to learn using their ears.

The app offers four quick ways to learn: Free News, Lean and Good Courses, Efficient Listening to Books, and E-books. The Free News feature allows users to learn 10 minutes a day continuously. The Lean and Good Courses feature provides users with over 100 lecturers in various fields, allowing them to learn professional knowledge efficiently. The Efficient Listening to Books feature offers selected good books in 6 major fields, and experts will give users in-depth analysis. The E-books feature offers carefully selected 700 practical books of all kinds, letting users carry them with them and read them easily.