Apple Watch Series 12 vs Samsung Galaxy Watch Ultra

GPS + Cellular models of Apple Watch Series 12 support 5G (RedCap) and LTE.

Good to know: Needs a carrier plan; costs vary.

Samsung says the Galaxy Watch Ultra is LTE-enabled, so you can leave your phone at home.

Good to know: Needs a carrier plan for LTE.

Apple Watch Series 12 has Siri powered by Apple Intelligence.

Good to know: Maker's description.

Samsung's Galaxy Watch Ultra page includes Google Gemini on the watch.

Good to know: Requires a Google account with Gemini.

Apple rates Series 12 at up to 24 hours of normal use and 38 hours in Low Power Mode; 15 minutes of charging gives up to 12 hours.

Good to know: Maker's figures.

Samsung rates the Galaxy Watch Ultra at up to 100 hours in Power Saving mode, and up to 48 hours in Exercise Power Saving mode.

Good to know: Maker's figures for power-saving modes; normal-use hours aren't on the page.

Apple Watch Series 12 works with an iPhone; Apple lists iPhone 11 or later on iOS 26 for its watchOS 26 features.

Good to know: Apple's requirement is a footnote on its watchOS 26 features.

Samsung lists the Galaxy Watch Ultra as compatible with Android 12 or later.

Good to know: Some features may need a Samsung Galaxy phone; check Samsung's page.