Apple's new Health Sensing System for Apple Watch Ultra 4 means more accurate and more frequent health metric tracking. Nearly every improvement made to Apple Watch Ultra 4 relates to health, fitness, and the ability to track those metrics. Even the longer battery life was pitched as a way to track metrics over a longer period of time.

Tim Cook may have stepped down as CEO before Apple Watch Ultra 4 was revealed, but it and the Apple Watch Series 12 are clear realizations of his vision. Apple Watch is a health-focused wearable that aims to improve the wearer's life, and perhaps even save them in emergency situations.

Out of all of Apple's products, the Apple Watch is perhaps the most mature with very little wiggle room. The Apple Watch Ultra line appears to be in an awkward position compared to the standard Series line. It has consistently received all updates brought to models like Apple Watch Series 12, but nothing 'Ultra' has been added or upgraded since the original model's launch.

The Apple Watch Ultra 4 gained a gram in weight thanks to the new sensor system. The electrodes are larger, surrounding the photo diodes where green LEDs collect data. The display remains identical across generations, you're getting the same 100m dive spec, and it is still a titanium case with orange accents.