Apple Watch Ultra 4 Leaked: Touch ID, Doubled Sensors, and Thinner Design Coming Fall 2026

Apple Watch Ultra 4 details are leaking ahead of an expected fall 2026 launch, and the upgrades are substantial. Here's what the latest reports reveal:

Touch ID Comes to Apple Watch

References to "AppleMesa" in leaked developer software point to fingerprint-based authentication on Apple Watch. Users may be able to unlock by touching the screen or digital crown — eliminating the need to type a passcode on a tiny display.

Doubled Sensor Array

The Ultra 4 is reportedly packing twice as many health sensors as the Ultra 3. Rather than introducing entirely new measurement types, Apple appears focused on making existing tracking significantly more accurate — particularly heart rate, SpO2, and temperature.

Real Blood Pressure Values

The biggest health feature: Ultra 4 may deliver actual systolic/diastolic blood pressure readings instead of the simple hypertension alerts introduced in Series 11. If confirmed, this would be a massive leap for wrist-based health monitoring.

Thinner, Lighter Design

Apple is reportedly thinning the Ultra 4 body while maintaining its rugged build quality — following the design trend set by the Series 11's thinner chassis.

Should You Wait or Buy Ultra 3 Now?

The Apple Watch Ultra 3 is currently discounted to $609 on Amazon. If you need a rugged smartwatch today, the Ultra 3 is still the best option. But if Touch ID and improved health sensors are important, waiting until September may be worth it. Read our full analysis.