Understand Korean - 30 days course is a free Android application developed by Jenson M under the Education & Reference category. The app offers a comprehensive 30-day course to learn the basics of the Korean language, including daily conversations, grammar, sentence-building, and Hangul reading.

The course is designed to help users understand why sentences and phrases are built in a certain way, instead of just memorizing them. The app also includes a section to teach users how to read Hangul, which can be learned within days or even hours. Once users learn how to read Hangul, they can easily memorize and have basic Korean conversations.

The app is completely free of charge, and users do not need to pay to unlock any features. In addition to learning Korean, the app also includes a section to practice what users have learned. It contains lots of random Korean questions in all the topics that are covered in the course. Overall, Understand Korean - 30 days course is an effective and accessible way to learn the Korean language for beginners.