Comparing Apple Watch Ultra 3 and 4: What You Need to Know

WHO:

MacRumors - The Apple Watch Ultra 4 is the latest model from Apple.

WHAT:

MacRumors - The Apple Watch Ultra 4 is available for pre-order.

MacRumors - The starting price for the Apple Watch Ultra 4 is $799.

MacRumors - The Ultra 4 features a new health sensing system, more memory (4GB RAM compared to 2GB in Ultra 3), and improved battery life.

MacRumors - The Ultra 4 has a battery life of up to 50 hours of normal use and up to 84 hours in Low Power Mode.

MacRumors - The Ultra 4 includes high-frequency background heart rate tracking every five seconds, which is 60 times more frequent than the Ultra 3.

MacRumors - The Ultra 4's Vitals app tracks heart rate, respiratory rate, wrist temperature, sleep duration, and HRV.

MacRumors - The Ultra 4 has an "Audio Intelligence" feature that includes Live Rewind, Siri Recap, Sound Recognition, and automatic music identification with Shazam.

WHERE:

MacRumors - The Apple Watch Ultra 4 is available for pre-order online.

WHEN:

MacRumors - The Apple Watch Ultra 4 launches on Friday, September 18.

WHY:

MacRumors - The Ultra 4's enhancements are aimed at providing more detailed health and fitness insights.

MacRumors - The improvements in battery life are particularly beneficial for endurance athletes.

HOW:

MacRumors - The Ultra 4 utilizes the S11 chip (2026) compared to the S10 chip (2024) in the Ultra 3.

MacRumors - The Ultra 4's charging capabilities allow for 15 minutes of charging to provide up to 18 hours of normal use.

(UPDATED September 16, 2026 16:03 UTC)

Apple has just unveiled the Apple Watch Ultra 4, which is now available for pre-order at a starting price of $799. This latest model boasts a new health sensing system, enhanced memory, and impressive battery life, lasting up to 50 hours with normal use and up to 84 hours in Low Power Mode. The Ultra 4 is set to launch on Friday, September 18, and features advanced capabilities like high-frequency heart rate tracking and an "Audio Intelligence" feature that includes automatic music identification.