
Apple Watch Series 12 and Ultra 4: New Health Sensors and Battery Life Drive Upgrade Decisions
Apple’s new Series 12 and Ultra 4 watches introduce significant hardware upgrades, including a more accurate heart rate sensor, extended battery life, and new health metrics like readiness scores. While the Series 12 is widely recommended for its improved fitness tracking, the Ultra 4 offers longer battery life but may not justify an immediate upgrade for existing Ultra owners.












