영어회화 300문장 is an educational application developed by sunflower studio, available for Android users. This free app is designed to help users improve their English language skills with a series of 300 video lessons. The app offers features such as video playback, pause, full-screen mode, and a playback history.

One of the app's key features is the option to bookmark videos that users find particularly useful, allowing them to easily access them in the future. Additionally, while watching videos, users can input words to test their memory and improve their retention. The app uses videos from Deeva Jessica's YouTube channel, with all video copyrights belonging to Deeva Jessica.

Deeva Jessica is a well-known American English teacher who has a wealth of experience in teaching English as a second language. She has worked as an AfreecaTV BJ and an ArirangTV reporter. Since 2014, she has been an English teacher at EBS, a Korean educational broadcasting company.

Overall, 영어회화 300문장 is a valuable tool for anyone looking to improve their English language proficiency. The app is easy to use and offers a range of features that make it an engaging and effective learning experience.