Google Pixel Watch 4 (41 mm, Wi-Fi) / Samsung Galaxy Watch7 44 mm Bluetooth

The 45 mm model weighs 36.7 g.

GIGAZINE gives the 41 mm model's resolution as 426 × 426.

The 2000-nit peak helps readability in sunlight; using the always-on display shortens battery life.

The ability to drop to 1 Hz reduces the battery cost of the always-on display.

The co-processor handles notifications and sensor work while the screen is off without waking the main processor, saving battery.

The 45 mm model has a 455 mAh battery and up to 40 hours with the always-on display.

The watch sits in a new side-mounted dock; earlier Pixel Watch chargers do not fit this model.

ECG and some health features may be limited by country; readings are not a medical diagnosis.

The L5 band helps separate signals reflected by tall buildings and trees; dual-frequency mode can increase battery use.

This entry covers the Wi-Fi model; LTE and UMTS cellular connectivity is only on the LTE model.

This version has no cellular connection; calls and notifications come through the paired phone.

5 ATM suits shallow-water activities like swimming, not diving or high-speed water sports.

5ATM describes water resistance suitable for surface swimming; it is not for diving or high-speed water sports.

Some features depend on the phone's Android version and the Pixel Watch app.

A fast wireless charging puck is in the box, but no wall adapter.

Availability of ECG and blood pressure depends on country and paired phone; blood pressure measurement is not offered in the US.

Energy Score turns sleep, activity and heart data into a daily readiness score; AGEs Index is experimental and not for diagnosis.