Scanem.io will bring your Influencer Marketing on Instagram to a new level, saving you hundreds of hours and thousands of dollars on Influencers search, analytics and management.
No Instagram/Facebook login is required.
Search Influencers by keywords, website, categories...
I am using a free app called "Followers+" but it is very basic. It just shows a basic graph of your lost and gained of follower numbers.
Also after turning one of my IG accounts to business, I can get some insight from IG but nothing can beat a proper analysis dashboard with various data.