The Apple Watch Series 12 is available for preorder at Amazon — the 42mm GPS model starts from $399, the 46mm GPS from $449, the 42mm GPS + Cellular from $489.99, and the 46mm GPS + Cellular from $549. Apple redesigned the optical heart rate sensor with a 32-petal light pattern, up from the two-petal design used on earlier Apple Watch models, as part of a broader hardware overhaul aimed at more precise heart tracking. Charging is also quicker, reaching an 80% charge in about 30 minutes on top of the 15-minute fast charge that provides 12 hours of use. It ships for free. It’s due to release on September 18. Buy Now at Amazon