What matters

Apple Watch Series 11 and Apple Watch Ultra 3 are close enough in category or buying context to deserve a side-by-side check. The generated brief keeps the framing practical: it shows what the database can compare today and avoids turning partial fields into a verdict.

Key differences

  • Display: Apple Watch Series 11: Always-On Retina LTPO3 OLED; Apple Watch Ultra 3: Always-On Retina LTPO3 OLED.
  • Sensors: Apple Watch Series 11: Electrical heart sensor / Third-generation optical heart sensor / Blood oxygen sensor / Temperature sensor / Compass / Always-on altimeter / High-g accelerometer / High dynamic range gyroscope / Ambient light sensor / Depth gauge to 6m / Water temperature sensor; Apple Watch Ultra 3: Electrical heart sensor / Third-generation optical heart sensor / Blood oxygen sensor / Temperature sensor / Depth gauge / Water temperature sensor / Compass / Always-on altimeter / High-g accelerometer / High dynamic range gyroscope / Ambient light sensor.
  • Battery: Apple Watch Series 11: 1 day; Apple Watch Ultra 3: 1.75 days.
  • Water resistance: Apple Watch Series 11: 50m swimproof; Apple Watch Ultra 3: 100m; recreational scuba to 40m.
  • Weight: Apple Watch Series 11: 37.8 g; Apple Watch Ultra 3: 61.6 g.

Who it is for

  • Apple Watch Series 11: worth a closer look if these listed fields matter to you: Display: Always-On Retina LTPO3 OLED; Sensors: Electrical heart sensor / Third-generation optical heart sensor / Blood oxygen sensor / Temperature sensor / Compass / Always-on altimeter / High-g accelerometer / High dynamic range gyroscope / Ambient light sensor / Depth gauge to 6m / Water temperature sensor.
  • Apple Watch Ultra 3: worth a closer look if these listed fields matter to you: Display: Always-On Retina LTPO3 OLED; Sensors: Electrical heart sensor / Third-generation optical heart sensor / Blood oxygen sensor / Temperature sensor / Depth gauge / Water temperature sensor / Compass / Always-on altimeter / High-g accelerometer / High dynamic range gyroscope / Ambient light sensor.

Watch-outs

  • This brief is a starting point for comparison, not a final buying verdict.
  • Some detailed specs still need deeper source review before they should be treated as final.