Apple Watch Series 9 Vs. Ultra 2: Is The Bigger Battery Really Worth It? – SlashGear

Both the Apple Watch Series 9 and Ultra 2 run watchOS 10, bringing a redesigned interface and apps. However, this software is also available on older Apple Watches, so it’s not exclusive to these models.

In terms of health tracking, you get a temperature sensor, blood oxygen sensor, ECG, and third-generation optical heart rate sensor on both smartwatches. They can notify you of low cardio fitness levels and irregular, high, and low heart rates. In addition, features like emergency SOS, international emergency calling, crash detection, and fall detection are also available on both devices.

The customizable Action button and Siren are both exclusive to the Watch Ultra 2, as are a depth gauge, water temperature sensor, Depth app, and the Oceanic+ dive computer app. The Watch Ultra 2 also has dual speakers and a three-mic array, compared to the Watch Series 9’s single speaker and microphone.

Both smartwatches feature an IP6X dust resistance rating, but while the Watch Series 9 is water resistant up to 50 meters, the Watch Ultra 2 can survive in depths up to 100 meters and is MIL-STD 810H certified for durability. It can be used for recreational dives up to 40 meters and for high-speed water sports, too. The Watch Ultra 2 also has dual-frequency GPS (L1 and L5), compared to the Series 9, which has only L1 GPS, resulting in more accurate location data.

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