Phone Tracker By Number is a kid's tracking app for parents to keep an eye on their kids, or anyone else for that matter. You can find out where your kids are, or anyone else, using the app. The best part is that you can use it to keep an eye on your kids without having to spend any money. You don't need to buy a spy camera or a monitoring device. All you need is a smartphone with the app installed and you are good to go.

The app can track multiple phones, so you can install it on multiple phones and just tap the "invite" button to send an invitation to anyone you want. Once your child accepts the request, you will be connected in a private network and you can check the location on the map.