Apple’s latest smartwatch finally lets you leave your phone at home. Since it supports LTE, you can receive calls and texts on your wrist even when your phone is out of range. The third-generation Apple Watch also brings a faster processor and a new barometric altimeter for measuring activities like the numbers of stairs you climb. The Apple Watch isn’t meant to replace your phone, and just about anything you would usually use your phone for is better on a larger screen. But the freedom to leave your phone at home when you step out to walk the dog or go on a run may be just enough to persuade smartwatch skeptics that the Apple Watch is worth considering, especially for athletic types..