The Apple One free trial includes only services that you are not currently using through a free trial or a subscription. Plan automatically renews after trial until cancelled. Restrictions and other terms apply. Requires Apple Watch Series 7, SE, Ultra, or later. For a list of supported countries and regions, see apple.com/watchos/feature-availability.

The ECG app and irregular rhythm notification require the latest version of watchOS and iOS, and are not intended for use by people under 22 years old. The ECG app is available on Apple Watch Series 4 or later (not including Apple Watch SE). The irregular rhythm notification is not designed for people who have been previously diagnosed with AF. I really like this feature, and when I'm testing other wearables, I miss it every time I wash my hands. I find that the countdown timer is sometimes accidentally triggered when I'm washing fruit and vegetables in the sink, but I just take it as a sign to wash again. 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 2023 using pre-production Apple Watch Series 9 (GPS) and Apple Watch Series 9 (GPS + Cellular), each paired with an iPhone; all devices tested with pre-release 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.

Difference between the Apple Watch Series 6 40mm vs 44mm display:

The international emergency calling feature requires an Apple Watch Series 6 (GPS + Cellular) model. For a list of supported countries and regions, see apple.com/watchos/feature-availability.

Apple says it increased the maximum brightness of the display from 200 nits to 500 nits when your wrist is down, which makes it easier to see in the sunlight. That's a welcome addition for me personally, as I live in Florida and spend a lot of time at the beach. And I can attest that the Series 6's screen is noticeably easier to read when I'm outside walking my dog and glance down. Case and band combinations can be made within collections (Apple Watch and Apple Watch Hermès) only. Later this year, Apple also plans to add a Low Cardio Fitness feature, which can notify you if your VO2 Max (a metric used to measure cardiovascular fitness indicating the maximum amount of oxygen your body can use during intense exercise) falls into a low range. AppsPerhaps the watch's biggest strength remains the App Store, which lets you browse and install apps right on the watch itself. With more than 20,000 Apple Watch apps available, it easily has the largest, highest-quality third-party selection of any wearable. In the Health app on your iPhone, you can view a record of all your measurements and see graphs of your blood oxygen level readings for the day, week, month, or year. It also shows your range and daily average, and you can filter the data to show just your SpO2 level in high-elevation environments or while sleeping. One nice improvement is that the Series 6 charges faster than the Series 5, which takes around two hours to fully charge. The Series 6 charges to 80 percent in about an hour and to 100 percent in 90 minutes. Always-On Altimeter