Apple Watch Series 11 vs. Apple Watch Series 10: Should you upgrade?

Apple’s September event put the spotlight on iPhones, but the Apple Watch Series 11 quietly picked up some big quality-of-life changes. The new watch looks the same as the Series 10, but there are meaningful upgrades: 24-hour battery life (up from 18 hours), 5G connectivity on cellular models and tougher Ion-X glass on aluminum versions.

The Series 11 also debuts a new health feature, hypertension notifications, which will alert you if your data shows consistent signs of high blood pressure. Importantly, Apple confirmed that this feature will also roll out to older watches, including the Series 10, Series 9 and Ultra 2 via watchOS 26.

The Apple Watch Series 11 starts at $399 and keeps the same 42mm and 46mm case sizes as its predecessor. It runs watchOS 26, uses the same S10 chip and supports the full health suite with ECG, blood oxygen monitoring, temperature sensing, sleep apnea alerts and sleep scoring.

As usual, the older your Apple Watch — especially Series 8 and earlier — the more tangible improvements and benefits you’ll see from jumping to the Series 11. But if you already have a Series 10, is it worth upgrading? For most people, the answer depends on how much you value endurance and connectivity. Let’s take a closer look at what’s new and what’s the same when it comes to the new Apple Watch Series 11 and last year’s Series 10.

Design and display

At first glance, these watches are nearly identical. Both use Apple’s familiar slim cases in aluminum or titanium, and feature the same Retina LTPO OLED display with always-on functionality and up to 2,000 nits of peak brightness. Physically, they are virtually indistinguishable. If you walked into an Apple Store and mixed them up on the table, you’d probably need to flip them over and check the spec sheet to tell which was which.

The change is under the surface, as the Series 11 aluminum models gain Ion-X glass with a ceramic coating that Apple says is twice as scratch-resistant as the Series 10. It’s not indestructible, but if you’re the type who regularly introduces your watch to door frames, it might save you a few scuffs.

Performance and connectivity

Performance remains steady between the two generations. Both use the S10 chip introduced in 2024, which means apps launch quickly and the overall experience should feel fluid. The one major change is in connectivity. The Series 11’s cellular models now support 5G, while the Series 10 remains limited to LTE. That won’t matter if you always keep your iPhone nearby, but if you’re the kind of person who likes to head out for a run or grab a coffee without a phone in your pocket, 5G gives you more breathing room.

Health and fitness features

Health and fitness tracking is robust on both models. ECG, blood oxygen, temperature sensing, sleep apnea alerts and sleep scoring are all supported on both the Series 10 and Series 11.

Hypertension notifications are debuting with the Series 11, but Apple has confirmed they will also be available on the Series 10 through a software update. So you don’t need to rush to upgrade if you’re only interested in blood pressure alerts — Apple’s giving your existing watch a boost, too.

Battery and charging

Battery life is where the Series 11 has the most practical differences. After years of quoting the same 18-hour figure, Apple now promises up to 24 hours of use on a single charge. It’s still not a full weekend away without a charger, but for the first time an Apple Watch can comfortably last through a full day and night without begging for the puck. Fast charging is still supported across both models, so even the Series 10 can be topped up quickly, but the Series 11 gives you more breathing room in everyday use.

Software experience

Both watches run watchOS 26 (Series 10 devices will get that in a software update), which introduces the redesigned Smart Stack, new workout modes and updated health dashboards. Apple has not tied any major new software features exclusively to the Series 11 apart from those that rely on its tougher glass or 5G hardware. In other words, the interface will feel the same whether you’re on the shiny new model or last year’s.

Price and availability

The Series 11 starts at $399, which is the same starting price the Series 10 had when it first launched. Apple typically phases out old flagship models once the latest has launched, but in the near future, you may be able to find a discounted Series 10 while retailers get rid of their stock. Both support the same case sizes and band compatibility, so existing accessories carry over. So if you’ve got a drawer full of straps, you don’t need to worry — they’ll still snap right on.

Should you upgrade?

If you’re wondering if now’s the time to step up to an Apple Watch Series 11, the decision will come down to how much you value endurance and connectivity. The Series 11 is the clear winner if you want 24-hour battery life, 5G support and tougher glass. Those changes may not sound dramatic at first, but they alter how you use the watch from day to night, especially if you rely on cellular data or wear it during workouts and sleep.

If you already have a Series 10, you’ll get the same health experience, the same software and the same performance. With hypertension notifications also arriving on Series 10 (and even the Series 9), the gap between them narrows even further.

The Apple Watch Series 11 doesn’t reinvent the formula, but its upgrades matter. The bump to 24 hours of battery life will make it more of an all-day and all-night companion, 5G makes it more reliable away from your phone and tougher glass adds peace of mind. Think of it this way: if you’re after durability and freedom from the charger, Series 11 is a safe bet. If you’d rather save money and still close your rings every day, stick with the Series 10 or grab one while there’s still discounted stock floating around on the internet.

Full specs comparison