Cleaner for Instagram is the best app to mass unfollow Instagram users. You can also mass block Instagram followers, mass delete Instagram posts and mass unlike Instagram photos or videos.
Here are all the app features:
* Mass unfollow
* Mass block and unblock
* Mass delete posts
* Mass download posts for backup
* Mass unlike posts
* Pending Actions Service (app continues to work in background)
* Whitelist manager (avoid accidental unfollows or blocks)
* Help Center
* Support for filters, undo, multiple accounts, relationship indicator
* Quick selection tools
* Advanced quick selection
* Activity log with undo option
Disclaimer: ‘Cleaner for Instagram’ is a third party companion app for Instagram and is not affiliated with Instagram/Facebook Inc.