Finding engage stats of Competitors account?

Title says it. I'm trying to find a .com or app that will let me get the % of engagment to followers for an account that it not mine. I am trying a new F/U method for FL and wanting to target new accounts. I have around 90 to choose from and wanted to get it down to the most engaging 10 accounts.

Hi. Try influencerdb.net . You can check there some interesting things like : Liketofollower ratio, growth per day etc.

That's pretty much exactly what I was wanting. Thank You!!