Twitter Autofollwer question

Good Morning BHW! tried to find an app that helps you to follow persons on Twitter but in vain. I would be grateful if someone is so nice to share this app,(if there is one) or script or something.
Thank you in advance )

I can only repeat myself: https://www.blackhatworld.com/seo/what-is-the-best-twitter-automation-bot.1152444/#post-12369298