app to track location of another phone

You need to find a phone. Maybe it's your kid's, your partner's, or your own that's gone missing again. You can absolutely do it. But it's not like the movies, and you're going to run into a mess of issues with privacy, battery life, and apps that just don't work.

Forget the fantasy of tracking any number instantly. Real-world location tracking uses a mix of GPS, Wi-Fi signals, and cell tower data to figure out where a device is.

Start with what's already on the phone

Before you download a new app, just use the phone's built-in tools. They're free and they work.

• iPhones: Use the "Find My" app. If the phone is logged into an Apple ID, you can see its location on a map from another Apple device or iCloud.com. It's very accurate.
• Android: Google's "Find My Device" is the same idea. As long as the phone is on and signed into a Google account, you can see it, make it ring, or wipe its data from anywhere.

These should always be your first move for finding a lost phone.

When you need something more: Family apps

This is for when you want to keep an eye on things long-term, not just find a lost phone once.

Life360 is a common one. It puts your family into a private "Circle" and shows you where everyone is. But it also does more, like detecting car crashes, sending driving reports (is your teen speeding?), and pinging you when someone gets to school or leaves home.

Qustodio is another big one for families. It tracks location well and also has a bunch of parental controls for managing screen time, blocking apps, and filtering websites. It even has a "Panic Button" for kids to hit if they're in trouble.

Other good apps in this space are Bark, which is more about monitoring for safety issues, and FamiSafe, which focuses specifically on tracking driving habits.

You have to talk about consent

You cannot track someone's phone without their permission. Full stop. Modern phones are built with privacy in mind and make you agree to location sharing. Any service that says it can track a phone just from the number is almost certainly a scam or illegal spyware.

Installing tracking software on someone's phone without them knowing—often called spyware or stalkerware—is a huge invasion of privacy. These apps hide in the background and log calls, texts, and location data.

I remember once I couldn't find my phone and was starting to panic. I used my partner's phone to log into Google's Find My Device, and it showed my phone pinging from a park a mile away. I drove over there in my 2011 Honda Civic, totally confused. The app said I was right on top of it, but I didn't see it anywhere. I hit the "Play Sound" button and heard a faint ringing coming from inside a city garbage can. I'd apparently thrown it out with an empty coffee cup. The security camera footage later showed me doing it at exactly 4:17 PM.

Look, these tools are for finding a lost phone or keeping your family safe. Using them for anything else is a problem. If you feel like you need to track someone secretly, the issue isn't about location, it's about trust.

So, for a lost device, use the tools already on the phone. For keeping track of family, an app like Life360 or Qustodio will give you more features.