틈틈사회-9급 (기출문제와 해설을 잠금화면에서 공부)

틈틈사회-9급 is an innovative Chrome extension designed to help students studying for the 9th grade civil service exam in Korea. It transforms your lock screen into an effective study tool by automatically displaying social studies questions each time you unlock your phone. This approach ensures that every phone activation becomes a valuable study moment, improving retention without extra effort.

The extension covers a range of relevant subjects including English, Korean, Korean history, public administration, administrative law, police studies, and brokerage. It provides extensive previous exam questions updated with the latest content, complete with clear and concise explanations for both correct and incorrect answers. Users can track their mistakes with an incorrect answer note feature, bookmark questions for review, and remove known questions to optimize their study experience. Best of all, all features and content are completely free, making it an essential tool for civil service exam preparation.