What is the Difference Between the Apple Watch Series 9 and 10?

If you’re an Apple Watch fan like me, you’ve probably been following the buzz about the Apple Watch Series 10 with great anticipation. Apple is celebrating a decade of the Apple Watch, and as someone who’s been using these watches since their early days, I’ve experienced firsthand how each series improves upon the last. So, what exactly sets the Apple Watch Series 10 apart from its predecessor, the Apple Watch Series 9? Let's dive into the key differences between Apple Watch Series 9 and 10 and help you decide if the upgrade is worth it.

On the left is the Apple Watch Series 9, and on the right is the Series 10. Image credit: Apple.

Design Changes in Apple Watch Series 10

At first glance, you might not notice a dramatic redesign with the Series 10. But as they say, the beauty is in the details.

Larger Displays and New Sizes

One of the first things you’ll notice about the Apple Watch Series 10 is its larger display. Apple has bumped the smaller model from 41mm to 42mm (9% larger than the 41mm versions of the Series 7, 8, and 9), and the larger one has increased from 45mm to 46mm (7% larger than the 45mm models).

For anyone who appreciates more screen real estate (like me, with my less-than-perfect eyesight), this is a subtle yet significant change. The bigger screen on the Apple Watch Series 10 makes interacting with the watch—whether checking notifications, using apps, or reading messages—so much easier.

I remember my first Apple Watch, and back then, even the biggest screen felt a bit cramped (especially because my fingers are large). Now, the increased size is a real game-changer for usability.

Redesigned Bands and Attachments

Apple is also shaking things up with the band attachments. Rumors suggest that the connectors have been redesigned, meaning your older bands might not fit the Series 10. If you’ve built up a collection of bands like I have, this could be a minor inconvenience, but it opens the door to new Apple Watch Series 10 band options specifically designed for the latest model.

On the image above, located at the top are some of the Apple Watch Series 10's color options, while below are from the Series 9 Apple Watch. Credit: Apple

Performance Upgrades: Series 9 vs. Series 10

Performance is always a focal point for Apple Watch upgrades. With the Apple Watch Series 10, Apple has introduced the S10 chip, which is faster and more efficient than the S9.

S10 Chip in Apple Watch Series 10

The S10 chip enhances machine learning capabilities, which Apple Watches rely on heavily for their health-tracking features and smart notifications. When you’re using apps or accessing information on the go, that speed increase really shines. I’ve personally noticed a slight lag with older Apple Watch models, especially when they start juggling multiple apps. The S10 chip in Apple Watch Series 10 ensures that lag is practically non-existent, making it a smoother user experience overall.

Health Monitoring Features: New Sensors and Capabilities

Apple continues to lead the charge in wearable health technology, and the Series 10 is no exception.

Blood Pressure Monitoring (Delayed Feature)

One of the most anticipated health features in the Series 10 is blood pressure monitoring, although it may not be ready at launch. Apple has been working on perfecting this feature, and if you’ve ever struggled with high or low blood pressure like me, you know how valuable this could be. That said, it might not be fully functional until later updates.

Sleep Apnea Detection and Oxygen Monitoring

The oxygen sensor from previous models has been improved in the Apple Watch Series 10, and sleep apnea detection is a new addition, although there have been some development delays. For anyone who struggles with sleep issues (I’ve had my share of restless nights), these features could provide valuable insights into your overall health.

Existing Health Features in Series 9

The Series 9, on the other hand, still offers a robust set of health-tracking features, including heart rate monitoring, ECG, and fall detection. These features are vital if you're monitoring specific health conditions, and they remain top-notch in the Series 9.

Battery Life: Is Series 10 Better Than Series 9?

Apple has been consistent with the 18-hour battery life across its models, but the Series 10 promises better energy efficiency thanks to the S10 chip. While both the Series 9 and Series 10 have similar battery capacities, you might squeeze a few extra hours out of the Series 10 with lighter usage. The Apple Watch Series 10's improved energy efficiency can make a big difference for those who use their watch all day long.

Software: watchOS 11 for Series 9 and 10

The watchOS 11 software update is coming to both the Series 9 and Series 10, but it’s optimized to work seamlessly with the Series 10’s new hardware.

New Features in watchOS 11

This latest software update includes new Smart Stack widgets, improved interfaces, and more health-tracking features. In my experience, Apple does an excellent job of rolling out updates that make their devices feel new again. But with the Series 10’s upgraded hardware, watchOS 11 will run more smoothly and efficiently than on older models.

Price Comparison Between Series 9 and Series 10

When it comes to price, the Apple Watch Series 9 GPS starts around $399, with the GPS + Cellular model being slightly more expensive. For those looking for a deal, the renewed Series 9 offers savings. 

However, if you’re like me and love the extra features, you might want to invest in the cellular model, which pushes the price higher. For the Apple Watch Series 10, expect similar pricing for the GPS model and a higher cost for the GPS + Cellular version.

Should You Upgrade to Apple Watch Series 10?

This is the million-dollar question, and it really depends on your needs.

Key Reasons to Upgrade

If you’re looking for a bigger screen, improved performance, and the potential for enhanced health-tracking features down the line, then the Apple Watch Series 10 is the way to go. As someone who relies heavily on my Apple Watch for fitness tracking and staying connected, I’d say the Series 10’s upgrades are enough to make it worth the investment.

Who Should Stick with Series 9?

However, if you already own the Series 9 and don’t feel like you need the larger screen or new sensors, sticking with the Series 9 might be just fine. It’s still a fantastic device that will handle most users' needs.

Conclusion: Which Apple Watch Is Right for You?

Ultimately, the Apple Watch Series 10 offers some exciting new features and performance boosts that make it a worthy upgrade for those who want the latest tech. But if you’re happy with your Series 9, it remains a solid option for everyday use.

Personally, as someone who’s been using Apple Watches for years, I always appreciate the incremental improvements Apple makes, but it’s important to weigh whether the enhancements align with your personal needs before making the upgrade.