"英検1級 でた単" is an educational app designed to help users prepare for the 英検１級 exam, featuring a comprehensive list of 5690 words and phrases that have appeared in past exams. The app offers a structured learning approach with categorized word lists and the ability to track question history and frequency. Users can practice by category, take 15-question tests, create custom word lists, and benefit from automatic audio playback. With a focus on vocabulary mastery, this app aims to enhance users' chances of success in the 英検1級 exam.

The app also provides information on the developer, Namiko Takahashi, who has achieved impressive results in the 英検1級 exam multiple times. Additionally, the app includes English audio by Patricia D. and utilizes sound effects from sources like フリー効果音素材 くらげ工匠 and ポケットサウンド Pocket Sound.