Follow4Follow - Get Followers is a free social and communication app developed by SocialBooster for Android 9.0. The app claims to help users gain more visibility on their social media profiles by exchanging likes, comments, and follows with other users.

Upon opening the app, users are prompted to log in with their Instagram account. Once logged in, users can start earning coins by liking, commenting, and following other users' profiles. These coins can then be used to get likes, comments, and follows on their own profiles.

The app also offers a VIP membership for users who want to earn coins faster and access more features. However, the app does not guarantee any specific number of followers or engagement on users' profiles.

Overall, Follow4Follow - Get Followers can be a useful tool for users who want to increase their social media visibility. However, users should be aware of the risks of using third-party apps that violate Instagram's terms of service.