Cloohawk offers a feature that lists down all the people who did not follow you back after you following them initially.
If you prefer to follow only such people who follow you back in return, then this feature is perfect for you. Cloohawk will scan your account and generate a list of people who are not following you back even after several days.
Just use the unfollow button to stop following and Cloohawk will perform the unfollow operation instantly.
Keep your account clean of non followers!!