With Secure Check Unfollowers you can securely check your Unfollowers on Instagram (people you follow and who don't follow you) or (people who followed you who stopped following you). In addition to having access to the list of Followers (followers) and the list of people you are following (Following). It uses the safest method to verify this information as it does not require your Instagram login and password. It only needs the ZIP file provided by Instagram to generate the information.
This version is a free version and contains ads. "Secure Check Unfollowers Pro" App is the ad-free and fully released version.