Apple launches new smartwatches with health monitoring and battery upgrades

• The Watch Series 12 and Watch Ultra 4 deliver higher-frequency heart rate and heart rate variability measurements
• The watches feature a re-architected Health Sensing System powered by the S11 chip, which Apple said was its most powerful wearable chip yet, and new optical and electrical heart sensors
• The Apple Watch Series 12 will be available in 42mm and 46mm sizes, with aluminium, titanium, or ceramic cases