The Apple Watch is a great smartwatch for most iPhone owners. For certain athletes, however, it wasn't able to compete with the best sport watches. That changes with the Apple Watch Ultra. Built for extreme conditions, it has a 49mm titanium case, flat Sapphire crystal, 36 hours of battery life, with 60 hours available via a new optimization setting, and improved dual-frequency GPS. It also has a customizable International Orange action button, a second speaker for increased volume and the built-in 89-decibel siren, a protected crown, a night mode, a depth gauge, and a new Wayfinder watch face that automatically tracks movement off-the-grid so you can always find your way back to basecamp.