런투런 학습앱공무원 7급 9급 경찰 소방 is an Android application developed by ezBrainSoft Co. Ltd. It is a free education and reference app that provides users with the ability to study anytime and anywhere. The app is designed for those who are preparing for the 7th and 9th grade civil service exams, as well as those preparing for the police and firefighting exams.

The app offers a wide range of features, including a variety of past exam questions, OX questions, smart notes, bookmarks, and an incorrect answer note. Additionally, users can utilize the app's writing mode during question-solving, and the dark mode feature is also available. The app is updated regularly, reflecting changes in the law, and the development team is always listening to user feedback.

Overall, the app is an effective tool for those preparing for civil service exams, police exams, and firefighting exams. The app's features, such as the ability to review and bookmark questions, make it a useful tool for anyone looking to improve their knowledge in the relevant subjects.