Apple Watch can do a ton of different things, but the most important for most people is health and fitness tracking. The new Series 6 model boosts this capability with a blood oxygen sensor, providing yet another key health metric. The always-on display is brighter and easier to read, and an always-on altimeter keeps track of climbs. While the overall design is the same as the Series 5, it does come in more colors than ever before, including a blue aluminum, product(RED) aluminum, graphite stainless steel, and a refined gold steel. It's joined by new bands, including the clasp-less Solo Loop and Braided Solo Loop, and the Apple Watch SE, which uses the chip and design from the Series 5 at a lower, $279 starting price point.