WebWatcher is a spyware or monitoring app where one can track the target device. If you have installed it to track a few of your other devices then it is visible on your phone. And If it is not installed by you, then any other who wants to keep track of your activities has installed it. If it is installed by your parents keep it, because they may be using it for your safety. It is done by others without your knowledge then it is better to uninstall it from your device.