커플라인 is a free social and communication app available on the Android platform. It is developed by jongsun kim and aims to provide users with enjoyable chatting experiences and the opportunity to meet new people in their neighborhood. The app promises to comply with Google Play policies and ensures that it monitors and implements systems to prevent advertisements and illegal malicious users.

With 커플라인, users can express their charm through photos and text, allowing them to make connections and engage in warm conversations. The app also emphasizes its commitment to enhancing youth protection by adhering to the "Recommendation for Strengthening Youth Protection Activities" from 방심위 (The Korea Media Rating Board). It prohibits certain behaviors within the app and actively monitors for illegal and harmful content to protect young users.

The app requires certain permissions, including access to phone, accounts, storage, camera, and microphone. These permissions are necessary for services such as login, customer support, photo registration, and sending pictures during chats.

Overall, 커플라인 aims to provide a safe and enjoyable chatting experience, while also prioritizing the protection of its users, particularly young individuals.