The 英語４技能コース is an educational and reference app developed by Recruit Co.Ltd. It is designed to help individuals improve their English language skills in reading, listening, speaking, and writing. The app offers a variety of training options, including concise lecture videos by renowned instructors, dictation and shadowing exercises, vocabulary learning, and speaking and writing practice. The app is exclusively available for group registered users and can be accessed from both smartphones and computers. With multiple levels to choose from, users can select a level based on their external English proficiency test scores or recommended school year. The app also provides specialized courses such as "Speaking Plus" and "Writing Plus," as well as a vocabulary learning tool called "TEPPAN English Words." Overall, the 英語４技能コース is a comprehensive online English learning service suitable for junior high and high school students.