Apple Watch Ultra 4 vs Google Pixel Watch 5
4 questions both answer, side by side. Every answer is backed by the dated sources at the bottom.
Side by side
Can a smartwatch work without your phone nearby?
Apple Watch Ultra 4 supports 5G (RedCap) and LTE, with antennas for cellular and satellite.
Good to know: Data plan required; 5G only in select markets.
Pixel Watch 5 LTE comes with 2 years of data and offers satellite SOS when there's no LTE coverage.
Good to know: LTE model only; maker's offer terms apply.
Can you talk to an AI assistant on your smartwatch?
Apple Watch Ultra 4 has Siri powered by Apple Intelligence.
Good to know: Maker's description.
On Pixel Watch 5 you raise your wrist to talk with Gemini.
Good to know: Maker's description.
How long does a smartwatch battery last?
Apple rates Apple Watch Ultra 4 at up to 50 hours of normal use and 84 hours in Low Power Mode; 15 minutes of charging gives up to 18 hours.
Good to know: Maker's figures.
Google rates Pixel Watch 5 at up to 40 hours, with 15 hours from 15 minutes of charging.
Good to know: Maker's figures.
Which phone does a smartwatch need?
Apple Watch Ultra 4 requires an iPhone 11 or later with iOS 27 or later.
Good to know: Apple lists iPhone models only.
Pixel Watch 5 works with most phones on Android 12 or newer, with a Google Account and the Pixel Watch app.
Good to know: Google lists Android phones only.
How we know (2 sources)
Apple Watch Ultra 4 tech specs (read Oct 24, 2026): up to 50 hours of normal use, up to 84 hours in Low Power Mode, up to 18 hours of workout tracking; 15 minutes of charging gives up to 18 hours. Supports 5G (RedCap) and LTE, with cellular/satellite antennas; data plan required. Siri powered by Apple Intelligence. Requires iPhone 11 or later with iOS 27 or later.
Read the sourceGoogle Store page for Pixel Watch 5 (read Oct 23, 2026): from $399.99; raise your wrist to talk with Gemini; up to 40 hours of battery, 15 hours from 15 minutes of charging. LTE models include 2 years of data and offer satellite SOS when there's no LTE coverage. Works with most phones on Android 12 or newer, with a Google Account and the Pixel Watch app.
Read the source