Wearable Index
Apple · Band

Watch Ultra 4

Shipping

The Apple Watch Ultra 4 is a $799 sensor band, shipping since 2026. Shipping flagship with a new Health Sensing System and S11 chip for five-second background heart-rate readings and a readiness score, plus 50-hour battery life and up to 45 hours of extended GPS workouts.

Compare this device
Apple Watch Ultra 4 — band worn on the wrist
Image sourceApple

Generations

GenerationYearStatusPriceWeight
Watch Ultra 4 2026 Shipping $799 63–63.1 g (finish dependent)
Watch Ultra 3 2025 Shipping $799 61.6–61.8 g (finish dependent)
Watch Ultra 2 2023 Discontinued $799 61.4 g

Specifications by generation

Apple Watch Ultra 4
Image sourceApple

Watch Ultra 4

2026Shipping

Shipping flagship with a new Health Sensing System and S11 chip for five-second background heart-rate readings and a readiness score, plus 50-hour battery life and up to 45 hours of extended GPS workouts.

Category
Band
Worn
Wrist
Release
2026
Price
$799
Weight
63–63.1 g (finish dependent)
Sensors & hardware
  • Biometric PPG heart rateECGBlood oxygen (SpO₂)Blood pressure (hypertension patterns)
  • Location GPS (L1/L5)Satellite / SOS
  • Camera Depth sensor
  • Audio Microphone
  • Compute On-device AI (Siri AI)
  • Connectivity Cellular (5G)

Developer access

  • watchOS SDK public stable
    • Native watch apps
    • Health and fitness integrations
    • watchOS
    • Xcode

    App Store distribution requires the Apple Developer Program and review. User permissions and API entitlements apply.

Documentation
public
App distribution
available

Distribute watch apps through the App Store under Apple review rules.

Not yet verified: vendor-server requirements and hardware and software openness.

Openness, servers & distribution
hardware

Schematics, mechanical designs and firmware publication were not verified.

firmware

Source availability and licensing were not established in this review.

companion apps

Source availability and licensing were not established in this review.

SDK

Source availability and licensing were not established in this review.

backend services

Source availability and licensing were not established in this review.

Vendor servers

Vendor-server requirements were not established for this device.

Distribution notes

Apple Watch platform; does not establish support for rumored Apple glasses, pendants or bands.

Apple Watch Ultra 3
Image sourceApple

Watch Ultra 3

2025Shipping

Adds a wider 3,000-nit display, the S10 chip, 5G and satellite connectivity, plus sleep-apnea alerts.

Category
Band
Worn
Wrist
Release
2025
Price
$799
Weight
61.6–61.8 g (finish dependent)
Sensors & hardware
  • Biometric ECGBlood oxygen (SpO₂)
  • Location GPS (L1/L5)Satellite / SOS
  • Camera Depth sensor
  • Connectivity Cellular (5G)

Developer access

  • watchOS SDK public stable
    • Native watch apps
    • Health and fitness integrations
    • watchOS
    • Xcode

    App Store distribution requires the Apple Developer Program and review. User permissions and API entitlements apply.

Documentation
public
App distribution
available

Distribute watch apps through the App Store under Apple review rules.

Not yet verified: vendor-server requirements and hardware and software openness.

Openness, servers & distribution
hardware

Schematics, mechanical designs and firmware publication were not verified.

firmware

Source availability and licensing were not established in this review.

companion apps

Source availability and licensing were not established in this review.

SDK

Source availability and licensing were not established in this review.

backend services

Source availability and licensing were not established in this review.

Vendor servers

Vendor-server requirements were not established for this device.

Distribution notes

Apple Watch platform; does not establish support for rumored Apple glasses, pendants or bands.

Apple Watch Ultra 2
Image sourceApple

Watch Ultra 2

2023Discontinued

Rugged titanium watch with the brightest display Apple ships.

Category
Band
Worn
Wrist
Release
2023
Price
$799
Weight
61.4 g
Sensors & hardware
  • Biometric ECGBlood oxygen (SpO₂)
  • Location GPS (L1/L5)
  • Camera Depth sensor

Developer access

  • watchOS SDK public stable
    • Native watch apps
    • Health and fitness integrations
    • watchOS
    • Xcode

    App Store distribution requires the Apple Developer Program and review. User permissions and API entitlements apply.

Documentation
public
App distribution
available

Distribute watch apps through the App Store under Apple review rules.

Not yet verified: vendor-server requirements and hardware and software openness.

Openness, servers & distribution
hardware

Schematics, mechanical designs and firmware publication were not verified.

firmware

Source availability and licensing were not established in this review.

companion apps

Source availability and licensing were not established in this review.

SDK

Source availability and licensing were not established in this review.

backend services

Source availability and licensing were not established in this review.

Vendor servers

Vendor-server requirements were not established for this device.

Distribution notes

Apple Watch platform; does not establish support for rumored Apple glasses, pendants or bands.

Company & funding

Apple Inc.

Public company

Company

Company-level corporate financing; not a separate funding round for this product.

Not yet verified: disclosed funding, valuation, round count, round history and named investors. A missing record does not imply zero funding.

Compare

Independent index — figures are approximate and editorial, not official spec sheets. Methodology. Last reviewed 2026-10-31.