■ Korean study series made in a separate book
■ Long-established publishing editors build on the National Institute of Standards and Standards Ambassador.
■ A comprehensive version of the Korean study series in one app has also been released.

To conquer the spelling of Hangeul, the most powerful grammar system in the universe, long-established publishing editors are making meticulous work.
Solve problems with easy spelling, wrong standard language, and correct foreign language notation.
In addition to providing accurate and detailed explanations in accordance with official language regulations, the National Institute of the Korean Language quickly reflects any revisions to the standard Korean ambassadors.

-Providing rich problems
-Correct and detailed problem explanation
-Learning and scoring by date
-Includes related language regulations (current Hangul spelling regulations)
-Incorrect and important issues review function
-Solve random problems

*Inquiry for school group license: info@byeol.co
** All grammar rules that apply to the issues and commentary in this app follow the principles of the National Institute of the Korean Language.