Short answer: There’s no legitimate, free “Stingray phone tracker” app that gives you the real Stingray (cell-site simulator) capabilities. Apps claiming to be “Stingray” trackers are either scams, misleading marketing, or limited-location trackers that use normal public data and device permissions.
Even if you managed to get your hands on Stingray-style technology, using it is highly illegal for private citizens in almost every jurisdiction. Intercepting cellular communications violates federal wiretapping laws and can lead to heavy fines and prison time. Better Alternatives for Location Tracking
If you need a safe, free, and legal tracker for legitimate purposes (finding your kids or elderly parents), ignore the "Stingray" noise. Use these verified methods.
It is not an app: You cannot download a real Stingray tracker for free on your phone.
2. The Paid "Subscription" Some scams market themselves as "Free Stingray tools." You download the launcher. It opens, asks for a target phone number, and then tells you: "Verification needed. Enter your credit card for a $0.50 identity check." Once you enter your card, they drain your account. There is no tracking. There is no data.
While you cannot be a Stingray with an app, there are apps designed to detect them. However, their effectiveness is highly debated: Find my Phone - Family Locator – Apps on Google Play