Honest takes. No growth hacks. Nothing that gets your account banned.
Every popular "who unfollowed me" tool works the same way: they ask for your Instagram password, then use it to call Instagram's API. That's a TOS violation. Here's the safe alternative.
Your follow ratio is a single number that signals a lot about your account's health, to the algorithm and to anyone who visits your profile. Most creators don't know what theirs is.
The follower tracking apps that ask for your Instagram password aren't doing it because it's the easiest technical solution. It's because your credentials have value to them.