ReportlyFollower Tracker is a free Android application developed by InstaAI Inc, designed to help Instagram users track and analyze their followers. The app allows users to view personalized analytics for their Instagram account, including engagement rates, top followers, lost followers, ghost followers, blockers, co-followers, and deleted likes, comments, tags, and accounts.

The app offers an engagement page with multiple auto-updating reports, as well as detail pages with multiple reports that update automatically. Users can gain in-depth analysis and insights into the different types of relationships they have with their followers. The app also offers organized lists to keep track of their profile and followers, including top followers and ghost followers based on comments and likes. Additionally, users can view profile pictures in full screen.

For unlimited access to additional features and reports, users can subscribe to Reportly Pro. The app offers monthly or yearly subscriptions, with the auto-renewing nature of the subscriptions clearly outlined in the app's terms of use.

Overall, ReportlyFollower Tracker is a robust analytics tool for Instagram users who want to gain insights into their followers and engagement rates.