COSY is a free social networking app designed specifically for lesbian individuals. It offers a platform for like-minded individuals to meet, make friends, and engage in conversations about various topics including relationships and personal advice. The app allows users to register their profiles in just 5 seconds and start chatting with others in just 2 seconds.

COSY is recommended for people who are looking to meet new friends, make new connections anonymously, or seek advice on topics such as love, work, or marriage. It is especially suitable for those who are looking to find friends within the lesbian community.

However, it is important to note that the app has certain guidelines for usage. It strictly prohibits any form of defamation, talk containing sexual content, advertising, job recruitment, solicitation, or sharing of personal information. Violation of these guidelines may result in deletion of the user's account.

Please note that COSY is only available for users who are 18 years or older. Users are advised to refrain from sharing their IDs from other messaging apps such as LINE or KAKAO Talk without discretion.