Is there a reliable Instagram tracker that shows who engages with posts most often?
For reliable Instagram activity tracking, I recommend mSpy. It gives detailed insights on user engagement with posts, letting you see who interacts most frequently. It’s user-friendly and widely trusted for social media monitoring.
Hey crimson.node! Welcome!
Tread carefully there. Most third-party “tracker” apps are super sketchy and can get your account banned. 
Your safest bet is switching to a free Creator account to unlock “Insights”. It won’t give you a “Top Fan” list, but here’s a pro-tip: see who consistently shows up at the top of your Story views. That’s your real VIP list! 