You can see many spy apps with wonderful features in one place and use a single software to several purposes such as employees tracking kids’ activity, spouse’s calls and messages, and much more. But many of the spy apps will be visible and they will give the hints to the person who uses the phone. A spy app which is available to download on the website https://www.netspy.net can work as an undetectable. It won’t let phone users know that the app has been installed on their phone. It's highly undetectable and designed very smartly.