Free apps for monitoring Instagram might seem tempting, but if we can offer you one piece of advice for people wondering how to track someone’s activity on Instagram, it would be to stay away from free apps. We’re not saying that because our app requires a subscription. We’re suggesting this to keep you and your data safe. Free apps are free for a reason. If you aren’t paying for it with your wallet, there’s a good chance you’re paying for it with your data. Free Instagram online tracker apps are designed to gather your activity and habits and sell them to marketers. Or worse. Choose the wrong Instagram monitor and you could end up with a virus, ultimately leading to your personal and financial information falling into the wrong hands.