Use APKPure App
Get Simple Unfollow old version APK for Android
Follow those who follow you and unfollow those who don't with a simple click.
If you ever wondered: "How can I unfollow those who don't follow me on Twitter?" or "How can I follow those who do? (Follow-back)" then Simple Unfollow is your app.
The execution of the process may take a while but do not need to the application run in the foreground, you can use another application or to even block the cellphone and Simple Unfollow continue doing its job.