Followers Assistant also has a Premium option that helps you gain followers by letting you do certain actions automatically. For example, you can like, follow, and even unfollow automatically. This Premium option costs $2 a month and can offer you very interesting benefits.
Followers Assistant is a very interesting app for Instagram users, especially for the frequent users. You can have a detailed control of those who follow you and those who have stopped following you. The best part is that it can also help you gain followers (as long as you are willing to pay a small fee).
Android 4.0.3 or greater is required