Find My iPhone and Find My Friends are two separate apps with different purposes. Find My iPhone is used to locate lost or stolen Apple devices, while Find My Friends is used to share your location with friends and family. Find My iPhone offers features like locating your device on a map, playing a sound on your device, remotely locking your device, and erasing all the data on your device. On the other hand, Find My Friends allows you to see the real-time location of your friends and family members who have shared their location with you. Both apps are useful in their own ways, but it's important to understand the differences between them to make the most out of each app's features.