Google’s new Fitbit Air offers a screenless, feather‑light design for $99, recording health data without crowding the wrist. Its sibling, the Google Pixel Watch 4, starts at $350 and packs Wear OS 6, a 3,000‑nit AMOLED display, and dual‑band GPS. Both integrate with the Google Health app, syncing data across Android and iOS devices.

The Air measures just 34.9 × 17 × 8.3 mm and weighs 5.2 g, fitting into a fabric Performance Loop band that snaps on. Battery life stretches to seven days, but charging is slow and it lacks GPS, ECG and cEDA. It also supports Bluetooth 5, but relies on a proprietary charger. The Watch 4’s 41 mm case sits 12.3 mm thick, weighs 31 g, and offers up to 48 hours of use with its 325 mAh battery.

For users who want reliable sleep tracking while the watch charges, the Air doubles as a companion, letting the Pixel Watch 4 stay powered overnight. The trade‑off is price and feature depth: the Air’s simplicity keeps costs low, whereas the Watch 4’s richer sensor suite and LTE option target power users. Watch 4 battery often needs charging. Ultimately, the two devices complement rather than replace each other.