Google Pixel Watch 2

Fitbit Google Pixel Watch 2 is a watch from 2023, sitting in the premium band at an indicative $349. It is no longer sold new. It stays in this comparison because plenty of people are still wearing one.

It reads 21 of the 33 signals this comparison tracks. Full coverage of activity. Nothing at all from body composition. Rarer readings it does take: AFib detection, ECG recording and sleep efficiency.

By sensor class: 2 at clinical grade and 13 at consumer grade. That grade is my classification of the hardware, not a lab test. Those readings come from an optical heart rate sensor, ECG electrodes, an optical blood oxygen sensor, a skin temperature sensor, a GPS receiver, a barometer and an accelerometer. It records an ECG and screens for atrial fibrillation. Those are screening features, not a diagnosis. Blood oxygen is measured through the night, not continuously through the day.

Its 1 days per charge are the 73rd longest of the 74 devices of its kind here that publish a figure. The AMOLED screen can stay always on. Built-in GPS. Rated 5ATM + IP68, fine for swimming. It weighs 31 g. On top of the tracking it also handles music on the device, contactless payments, its own LTE connection and offline maps. Case size 41mm. No subscription is required.

Prior-gen Wear OS (superseded by Watch 3); first Pixel Watch w/ cEDA continuous stress, skin-temp; ECG + SpO2.