Yes, FaceTime is a proprietary video conferencing software application developed by Apple Inc. It is exclusively available on Apple devices such as iPhones, iPads, iPod touch and Mac computers. FaceTime allows users to make video and audio calls from one Apple device to another using the registered phone number or Apple ID. It uses an internet connection and offers high-quality video and audio during calls. Therefore, if you are using a non-Apple device, you cannot use FaceTime. However, there are several other similar applications available for Android, Windows, and other platforms that can be used to make video calls.