Apple Watch Ultra 2, Apple Watch Series 9 and Apple Watch SE require iPhone Xs or later with iOS 17 or later. 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. Intended for use by people 22 years old and over. Charge times are from 0–80% and 0–100% using the included Apple Watch Magnetic Fast Charging USB-C Cable. Testing conducted by Apple in August 2022 using preproduction Apple Watch Series 8 (GPS) and Apple Watch Series 8 (GPS + Cellular), each paired with an iPhone; all devices tested with prerelease software, Apple Watch Magnetic Fast Charging USB-C Cable (Model A2515), and Apple 20W USB-C Power Adapter (Model A2305). Charge time varies with region, settings, and environmental factors; actual results will vary. You can even log sexual activity to help you monitor possible fertility – while the main benefit is the information displayed in a larger way on the iPhone health app, it’s a nice addition to the watch to help make sure you can log the key information easily.

Apple Watch All-Day Battery Life testing was conducted by Apple in August 2019 using preproduction Apple Watch Series 5 (GPS) and Apple Watch Series 5 (GPS + Cellular), each paired with an iPhone; all devices were tested with prerelease software. Battery life varies by use, cellular coverage, configuration, and many other factors; actual results will vary. See www.apple.com/batteries and www.apple.com/watch/battery.html for more information.Apple Watch Ultra 2 has a water resistance rating of 100 metres under ISO standard 22810. It may be used for recreational scuba diving (with compatible third-party app from the App Store) to 40 metres and high-speed water sports. Apple Watch Ultra 2 should not be used for diving below 40 metres. Water resistance is not a permanent condition and can diminish over time. For additional information, see support.apple.com/en‑gb/HT205000. 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. Intended for use by people 22 years old and over.

Apple Watch Series 1 has a water resistance rating of IPX7 under IEC standard 60529. Apple Watch Series 1 is splash and water resistant, but submerging it is not recommended. It’s one of those apps that’s perfect for the smartwatch, as you can easily enter when your period begins, whether you’ve noticed spotting, any symptoms you’ve experienced – all being used to build a predicted picture of when your period is likely to start. Apple Watch Series 5 (GPS + Cellular) can use a cellular connection for Emergency SOS. To use Emergency SOS on an Apple Watch without cellular, your iPhone needs to be nearby. If your iPhone isn’t nearby, your Apple Watch needs to be connected to a known Wi-Fi network and you must set up Wi-Fi Calling. Given that the Watch 4 is off-sale, the Watch 5 is simply an upgrade, with more storage, a compass and an always-on display… turn that off and it’s just a slightly-updated smartwatch for 2019. Requires an iPhone and Apple Watch with second-generation Ultra Wideband chip. Ultra Wideband availability varies by region.Emergency SOS requires a cellular connection or Wi‑Fi calling with an internet connection from your Apple Watch or nearby iPhone. It’s hard to say anything new at all about the design of the Apple Watch 5 because it’s so similar to how the range has looked since its inception (the larger screen launched last year notwithstanding).

Below that a lozenge-shaped button allows you to see your most recent apps, as well as activate Apple Pay so you can buy things without needing to whip out your wallet or purse (or phone).The Apple Watch 5 certainly hasn’t got the stamina of the Watch 4, which is clearly down to the always-on display. We estimate that this draws about 2% power per hour, which means you’ve lost close to 50% over a 24-hour period before you’ve even started using the Watch. While it’s coming to most of the Apple Watch range, WatchOS 6 shines brightest on the latest model, and the Apple Watch 5 uses its new features well That said, these features will be landing on the older Watches as well, meaning that if you’re simply buying a Watch for fitness use – and if you can take or leave the new always-on display – you’d be well served by the Watch 4, or even the Watch 3, which remains on sale from Apple.