For now, only TheTruthSpy version for iOS iDevice (iPhone/ iPad) supports the remote uninstalling features. To do this, you need to set a monitor number then use that monitor number to send SMS command <*#93> to the target phone number (a phone which TheTruthSpy is installed). The monitor number is not the target phone number. Email and password are email and password of your TheTruthSpy account.
But for all platform versions you can go to a user control panel (http://my.thetruthspy.com) to go to settings and you can see more options in that you can click 'uninstall remotely'. Next sync the application will be removed automatically from the target device.
Or if you have a chance to keep in your hand the target device, you can uninstall/remove the application like normal applications.