twitter followers follow

Hello Guys im new here and i got a big list of follow back list but im wondering how can i follow all of the list very fast?

I'm looking for a Twitter App that can do the following: 1) Gather +3000 usernames from ONE person's (business competitor) follower list. 2) Once list is gathered, have application follow 150-1000 users per day based on the list. ISSUE: The current app I'm has automated following, but...