Apple Watch Series 5 review: always-on and better in all ...The Apple Watch Series 5, released in 2019, is a smartwatch that introduced the now-standard always-on Retina display, a compass for navigation, and international emergency calling. It runs on the Apple S5 chip and comes in 40mm and 44mm sizes, offering features like fall detection, an ECG app, workout tracking, and Apple Pay. While no longer the latest, it's a capable device for essential health, fitness, and daily tasks, though it will not receive new software features or security updates in the long term.