Yes, mobile spy applications do work. The main purpose of such an application is to keep an eye on your target. The target might be your child, spouse, or employee. There is actually a lot of demand for such tracking or spying application in the market.
Hey! Many must have wondered . It's not hard, just check out this article on how to spy on someone else's phone. Just download the spy app and this app will do everything for you. Easy peasy!