Any iOS device with version 8.0 or later can be monitored.
iPhone X, iPhone 8 Plus, iPhone 8, iPhone 7 Plus, iPhone 7, iPhone 6, iPhone 6 Plus, iPhone 6S, iPhone 6S Plus, iPhone 4S, iPhone 5, iPhone SE, iPad 2, iPad 3, iPad Air, iPad Mini, iPad Mini 2, iPod Touch
There is no need to jailbreak to spy on the target device by using the FoneMonitor.
Android device which is with version 4.0 or later can be monitored
Samsung, LG, and any other brand device which is running Android 4.0 or later.
There is no need to root the target Android device to install the FoneMonitor.