fenix 8 (AMOLED, 47mm)

Garmin fenix 8 (AMOLED, 47mm) is a watch from 2024, sitting in the flagship band at an indicative $999.

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 Body Battery.

By sensor class: 11 at high accuracy and 3 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 during sleep, not continuously through the day.

Its 16 days per charge are the 32nd longest of the 74 devices of its kind here that publish a figure. The AMOLED screen can stay always on. Multi-band GPS. Rated 10ATM (100m) / dive 40m, fine for swimming. It weighs 73 g. On top of the tracking it also handles music on the device, contactless payments and offline maps. Case size 47mm. No subscription is required.

Premium multisport flagship; Elevate Gen 5 with FDA-cleared ECG app (US), mic/speaker, dive mode.