Keeping tabs on who someone has recently followed on Instagram isn’t as simple as it used to be. Thankfully, there are apps and websites that let you see who someone recently followed on instagram by using information available publicly. It’s best to use tools that don’t ask for your account password to avoid any security risks. While these services might not capture every change instantly, they’re a useful way to get a general idea of someone’s new connections without having to check manually all the time.
RE: FollowMeter - Unfollowers Analytics for Instagram