Apple Watch Series 9 (Aluminum, GPS, 45 mm) Specs

About this Apple Watch

The Apple Watch Series 9 maintains a strong resemblance to its predecessor, the Series 8, but features significant internal improvements. One of the most notable upgrades is the inclusion of the S9 SiP chip, which houses a dual-core CPU with 5.6 billion transistors, 60% more than the Series 8. This chip contributes to the watch’s 18-hour battery life and supports its always-on display, capable of reaching up to 2000 nits of brightness. This enhanced brightness is particularly useful in direct sunlight, ensuring the display remains visible even in bright conditions. 

The Series 9 also excels in health and wellness features, introducing Temperature Sensing and Cycle Tracking. This functionality uses a sensor to monitor wrist temperature, providing insights into physiological changes that may be related to factors like exercise, sleep patterns, or illness. The Cycle Tracking feature, for example, offers highly accurate period predictions and can retrospectively estimate ovulation times, which is valuable for family planning.   

In terms of user interface, the Series 9 runs on watchOS 10, which brings several usability improvements, including a new control center accessed via the side button and a customizable SmartStack of widgets for glanceable information. The operating system overhaul enhances the overall experience, with refreshed native apps and better integration with services like Apple Pay and Apple Music. 

Siri’s performance on the Series 9 has seen significant enhancements, with a 25% improvement in dictation accuracy and more reliable responses. This makes the watch more user-friendly for tasks like setting reminders or timers. The watch also includes an ultrawideband chip, enabling Precision Finding with the iPhone 15, allowing users to locate their phone within a 30-foot range.       

As a sports watch, the Series 9 continues to impress, offering reliable GPS tracking and heart rate monitoring. While it doesn’t feature the multiband GNSS found in the Ultra 2, its GPS accuracy is satisfactory for most activities, including marathons and half marathons. The watch supports a wide range of sports, providing detailed data and metrics for each activity, especially for running and cycling, with the latter receiving special attention in watchOS 10.  

Inclusive Features

• GPS tracker 
•  Apple S9 processor
• 396×484 “Always-On Retina” LTPO OLED display
• Up to 2000 nits brightness
• Double Tap gesture support
• Improved Siri capabilities
• Digital Crown with haptic feedback
• Pre-installed watchOS 10.0.1
• Ion-X glass display cover
• Up to 18 hours of battery life, 36 hours with Low Power Mode
• Five aluminum case options: pink, Midnight, Starlight, silver, and PRODUCT(RED)
• iPhone XS or later with iOS 17 or later required
• Wi-Fi 4 (802.11n) and Bluetooth 5.3
• 1 GB RAM, 64 GB storage
• Dimensions: 1.77 x 1.50 x 0.42 inches; Weight: 1.37 ounces
• No wireless cellular capability; requires tethered iPhone for some functions