Flanking the improved screen are the usual selection of buttons: the Digital Crown for navigation and a secondary, side button. The watch is packed with pretty much every sensor you’ll need: GPS, altimeter, improved accelerometer, optical/electric heart rate monitor and an ambient light sensor. Other wearables on the market boast some of these features, but none can claim them all, or do so in such an elegant package.

ECG app is available on Apple Watch Series 4 and later (excluding Apple Watch SE) and can generate an ECG similar to a single-lead electrocardiogram. Another improvement is processing power, thanks to the new S4 chip with dual 64-bit processor, which really shows in app loading times.If you really want to show off the new display then there’s the Vapor and Fire/Water watch faces that highlight the edge-to-edge nature of the panel. Testing conducted by Apple in August 2022 using pre‑production Apple Watch SE (2nd generation) (GPS) and Apple Watch SE (2nd generation) (GPS + Cellular), each paired with an iPhone; all devices tested with pre‑release software. When the ECG app arrives later this year, you'll be able to put your finger on the digital crown for 30 seconds to receive an ECG reading that you can export to PDF to share with your doctor.

miles per hour, the watch logged 2,097 steps compared with the Yamax SW-200 Digi-Walker's 2,120, for a negligible difference of 1.

The largest display, with up to 3000 nits of brightness — the brightest display Apple has ever designed.

The Series 4 marks the biggest tweak to the Apple Watch design since it first launched in 2014, in the form of a larger display.It’s main function is to relay Siri answer and queries back to you – something it handles well – but I’d like to always use it for, say, listening to a podcast while i’m home. There’s still no way to include flights of stairs climbed as part of your daily goal, something Richard Easton requested in his Apple Watch 3 review.