Apple unveils Apple Watch Series 12 & Ultra 4 with the most accurate heart-rate tracking

Apple unveiled the Apple Watch Series 12 and Apple Watch Ultra 4 with improved health tracking and Apple Intelligence features. The watches offer the most accurate heart rate sensing and track heart-rate variability, offering better insights into sleep, stress and activity. It can also remember key moments from conversations. Series 12 starts at $399 while Ultra 4 starts at $799.