Wondering what your best friend or significant other is doing at this very moment?

The GSM mobile phone tracking system allows you to keep tabs on unsuspecting cell phone users via the GPS-TRACK satellite network.

Based on repeater triangulation, the system tracks mobile phones using GPS and GSM technology. All you have to do is provide them with an area code and phone number and they search for you and provide you with a close up satellite image. While the website is clear it's not responsible for possible tracking errors that may occur, it's pretty entertaining to see how close you can zoom and if you can catch your friends doing something they shouldn't be doing.

You have to account for a margin of error, which changes significantly depending upon where you are based. It's 10 meters (max.) for mobile phones in Europe and the U.K., 25 meters (max.) for mobile phones in the U.S.A., South America and Canada and 50 meters (max.) for mobile phones elsewhere.

Caution: Do not get addicted to spying on your ex. It's not healthy.