This is the app I use to manage my Twitter account. I think you can get a free trial or you have to upgrade to paid. It works very well and you can schedule your tweets. Something that I like about this app. If someone unfollows you, they appear on a list of new unfollowers. You can simply use the app to unfollow them. It also has a feature for your fans. That way you can follow them back. It works with other Social Media accounts as well.
If you like Twitter and need to manage it, download this app in the Google Play Store.