Apple Watch Series 8 vs Series 9 – Which Should You Buy?

Choosing the right smartwatch depends on your daily habits, tech needs, and overall goals. The Apple Watch Series 9 and Series 8 may look similar, but they serve slightly different types of users. Series 8 remains a capable and well-rounded option, while Series 9 introduces a more responsive chip and some extra convenience features. Whether you’re upgrading from an older model or deciding between these two, this guide will walk you through the most important differences to help you choose the best fit for your lifestyle.

Side by Side Comparison

Detailed Feature Comparisons

Design and Construction
Both the Series 9 and Series 8 share the same case design, with 41mm and 45mm options and similar materials including aluminum and stainless steel. They are nearly identical visually and maintain the same durability standards with WR50 water resistance and IP6X dust resistance. There are no notable changes in construction between the two.

Display Quality
The Series 9 significantly increases brightness to 2000 nits, which makes it easier to read in direct sunlight compared to the Series 8’s 1000 nits. Both use the same OLED Retina display with always-on capability, but the improved brightness gives the Series 9 an edge in outdoor visibility.

Processor and Speed
Series 9 runs on the new S9 SiP with a 4-core Neural Engine, offering better responsiveness, smoother animations, and faster Siri processing. Series 8 uses the S8 chip, which is still capable but not as snappy under heavier loads or when using on-device commands.

Health and Fitness Features
Both models include advanced health features like ECG, blood oxygen monitoring, temperature sensing, and menstrual cycle tracking. However, neither introduces new health sensors compared to one another. If health tracking is your priority, both are equally equipped.

Smart Features and Siri
Series 9 introduces on-device Siri, which allows you to ask for health data or set timers even without an internet connection. It also adds the new Double Tap gesture for one-handed control, ideal when your other hand is busy. Series 8 lacks these features and requires a cloud connection for Siri.

Battery Life and Charging
Battery life is identical at up to 18 hours in standard mode, with both supporting fast charging. In real-world use, expect similar longevity from both models unless you heavily rely on features like Double Tap or on-device Siri, which may slightly affect Series 9’s battery.

Connectivity and Compatibility
Series 9 supports Bluetooth 5.3, improving connectivity efficiency and potentially reducing power draw. Series 8 runs on Bluetooth 5.0. Series 9 also enables Precision Finding for iPhone 15 users thanks to its second-generation UWB chip. Series 8 does not support this feature.

Storage and Internal Capacity
Storage gets a big upgrade in Series 9, doubling to 64GB. This allows more apps, music, and offline data compared to the 32GB in Series 8, which might be useful for users who use the watch more independently from the phone.

FAQ

Is the Apple Watch Series 9 faster than the Series 8?
Yes, the Series 9 features the new S9 chip, which includes a faster processor and a 4-core Neural Engine. This makes tasks like launching apps, interacting with Siri, and navigating the interface quicker than on the Series 8.

Does the Apple Watch Series 9 have better battery life than the Series 8?
No, both watches are rated for the same battery life—up to 18 hours of typical use. They also support fast charging and offer Low Power Mode for extended usage.

Can both Series 9 and Series 8 use the same watch bands?
Yes, they are fully compatible with the same bands. Both models come in 41mm and 45mm sizes, which match all bands designed for Apple Watch Series 7 and later.

What’s the benefit of the Double Tap gesture in Series 9?
The Double Tap gesture allows you to perform actions like answering calls, pausing timers, or playing music by tapping your thumb and index finger together. It adds convenience when your other hand is occupied.

Is Siri better on Series 9 compared to Series 8?
Yes, Siri on Series 9 works faster and can handle some commands locally, such as starting workouts or checking health stats, even when you’re offline. Series 8 requires an internet connection for all Siri functions.

Does the Series 9 have more storage than Series 8?
Yes, Series 9 has 64GB of internal storage, which is double the 32GB offered by Series 8. This is useful for storing more apps, music, or podcasts directly on the watch.

Are there any differences in the display between the two models?
The display resolution and size are the same, but the Series 9 screen is significantly brighter at up to 2000 nits. This makes a noticeable difference in outdoor readability.

Which model is better for someone buying their first Apple Watch?
If budget allows, the Series 9 offers better performance and future compatibility. However, if you find the Series 8 at a lower price, it still offers nearly the same core experience and is a solid entry point.

What iPhones are compatible with these watches?
Series 9 requires an iPhone running iOS 17 or later, while Series 8 works with iOS 16 or later. Both require iPhone 8 or newer for pairing and full functionality.

Is there a difference in durability or water resistance?
No, both models have WR50 water resistance for swimming and IP6X dust resistance. Neither is designed for scuba diving or high-speed water sports, but both can be worn while showering or swimming.