Despite a complex legal history involving a blood oxygen sensing technology patent dispute, the Apple Watch Series 9 is now available for purchase and even on sale for a discounted price of $429 (regularly $499). This powerful smartwatch is highly customizable, functions as a health tracker, emergency calling and crash detection device, and seamlessly integrates with iPhones. Its unique ‘double tap’ feature provides hands-free control in certain situations, and it can guide users to their misplaced iPhone.