Tool to find unfollowers + whitelists

Hello the BH fam!
Does anybody knows a tool/app (IOS or MAC would be better) that allows me to (on Instagram) :
- find people who don't follow me
- find people that don't follow me back
- create white lists (so that i don't unfollow some people even if they don't follow back)
- let me unfollow them directly on the app the OR access in few clicks to the profil directly on the app/instagram website (would be a big plus)

I'm willing to pay

Thanks!