Apple Watch Series 8 Aluminium

Quick Facts

Item	Details
Launch Year	2022
Case Material	Aluminium
Available Sizes	41mm, 45mm
Display	Always-On Retina LTPO OLED Display (352 × 430 / 396 × 484)
Processor	Apple S8 SiP
Connectivity	GPS or GPS + Cellular
Battery Life	Up to 18 hours
Water Resistance	50m (WR50)
Health Features	Heart Rate, ECG, Blood Oxygen, Temperature Sensing, Crash Detection
Glass	Ion-X Strengthened Glass
Storage	32GB
Weight	31.9g (41mm), 38.8g (45mm)
Compatibility	iPhone only

Overview

The Apple Watch Series 8 Aluminium is an excellent everyday smartwatch for iPhone users, combining advanced health monitoring, reliable fitness tracking and a lightweight aluminium design. Building on the Series 7, it introduces Temperature Sensing and Crash Detection while retaining the popular Always-On Retina display.

Powered by the Apple S8 SiP, it features ECG, Blood Oxygen monitoring, built-in GPS, optional GPS + Cellular connectivity, up to 18 hours of battery life and 50m water resistance. When buying a used Apple Watch, check the battery condition, Activation Lock status and overall physical condition before making your purchase.

Key Highlights

1. Advanced Health Monitoring

Apple Watch Series 8 adds Temperature Sensing alongside ECG and Blood Oxygen monitoring for more comprehensive health insights.

Why it matters

Measures overnight wrist temperature
ECG and Blood Oxygen monitoring
Supports long-term health tracking

2. Crash Detection

Series 8 can detect severe car crashes and automatically contact emergency services if you’re unresponsive.

Why it matters

Added personal safety
Automatic emergency assistance
Peace of mind for everyday travel

3. Always-On Retina Display

The bright Always-On Retina display makes it easy to check notifications, workouts and the time at a glance.

Why it matters

No need to raise your wrist
Excellent outdoor visibility
Smooth everyday experience

Key Features Explained

Feature	Specification	Why It Matters
Display	Always-On Retina LTPO OLED Display	Bright, sharp and easy to read throughout the day
Processor	Apple S8 SiP	Fast and responsive everyday performance
Battery Life	Up to 18 hours	Designed for a full day’s typical use
Charging	Magnetic Fast Charging	Quickly tops up your battery when needed
Water Resistance	50m (WR50)	Suitable for swimming but not diving
GPS	Built-in GPS	Tracks outdoor workouts accurately
Cellular	GPS or GPS + Cellular	Cellular models stay connected without your iPhone (supported carrier required)
Health Features	Heart Rate, ECG, Blood Oxygen, Temperature Sensing, Crash Detection	Advanced health and safety monitoring
Glass	Ion-X Strengthened Glass	Lightweight and durable for everyday use
Compatibility	iPhone only	Apple Watch is not compatible with Android phones

GPS vs GPS + Cellular

Feature	GPS	GPS + Cellular
Built-in GPS	✓	✓
Make calls without iPhone	✗	✓
Send messages	✗	✓
Mobile data	✗	✓
Requires mobile plan	No	Yes
Best For	Users who usually carry their iPhone	Users who want to stay connected without their iPhone

Which should you choose?

Choose the GPS model if your iPhone is usually with you. Choose the GPS + Cellular model if you want to make calls, send messages and use mobile data directly from your watch with a supported carrier and mobile plan.

Compare the Related Models

Feature	Apple Watch Series 7 Aluminium	Apple Watch Series 8 Aluminium	Apple Watch Series 9 Aluminium	Apple Watch SE (2nd Generation) Aluminium
Launch Year	2021	2022	2023	2022
Display	Larger Always-On Retina Display	Always-On Retina Display	Always-On Retina Display	Retina LTPO OLED
Processor	Apple S7	Apple S8	Apple S9	Apple S8
Health Features	Heart Rate, ECG, Blood Oxygen, Fall Detection	Heart Rate, ECG, Blood Oxygen, Temperature Sensing, Crash Detection	Heart Rate, ECG, Blood Oxygen, Double Tap, Temperature Sensing, Crash Detection	Heart Rate, Fall Detection, Crash Detection
Battery Life	Up to 18 hours	Up to 18 hours	Up to 18 hours	Up to 18 hours
Storage	32GB	32GB	64GB	32GB
Water Resistance	50m	50m	50m	50m
Connectivity	GPS / GPS + Cellular	GPS / GPS + Cellular	GPS / GPS + Cellular	GPS / GPS + Cellular
Glass	Ion-X	Ion-X	Ion-X	Ion-X
Weight	32.0g / 38.8g	31.9g / 38.8g	31.9g / 38.7g	26.4g / 32.9g

Which Apple Watch Should You Choose?

Model	Recommended For
Apple Watch Series 8 Aluminium	Buyers who want advanced health tracking and Crash Detection.
Apple Watch Series 9 Aluminium	Buyers who want the faster S9 chip and Double Tap gesture.
Apple Watch SE (2nd Generation) Aluminium	Buyers looking for excellent value and everyday performance.
Apple Watch Series 7 Aluminium	Buyers who want an Always-On Display at a lower price.

Alternatives to Apple Watch Series 8 Aluminium

If you’re comparing before buying, you may also want to check these related SellUp Marketplace pages:

Common Questions

Is the Apple Watch Series 8 Aluminium still worth buying?

Yes. The Apple Watch Series 8 Aluminium remains one of the best Apple Watches for everyday users, offering an Always-On Retina display, Temperature Sensing, Crash Detection and comprehensive health tracking. When buying used, check the battery condition and ensure Activation Lock has been removed.

What is the difference between the Apple Watch Series 8 and Series 7?

The Apple Watch Series 8 adds Temperature Sensing and Crash Detection while maintaining a similar design, display and battery life. Both models feature ECG, Blood Oxygen monitoring and fast charging.

Is the Apple Watch Series 8 Aluminium waterproof?

The Apple Watch Series 8 Aluminium has a 50m (WR50) water resistance rating, making it suitable for swimming. It is not intended for diving or high-pressure water sports. Water resistance may decrease over time on used devices.

Is the Apple Watch Series 8 Aluminium better than the Apple Watch Series 9?

The Apple Watch Series 9 introduces the faster Apple S9 processor, Double Tap gesture and on-device Siri processing. If you want the latest performance and features, choose the Series 9. If you’re looking for excellent value, the Series 8 remains a fantastic option.

Why Buy the Apple Watch Series 8 Aluminium?

The Apple Watch Series 8 Aluminium combines an Always-On Retina display, Temperature Sensing, Crash Detection and advanced health tracking in a lightweight aluminium design. It offers an excellent balance of performance, features and value for iPhone users. Compare Apple Watch Series 8 Aluminium listings on SellUp Marketplace to find the condition, case size, connectivity option (GPS or GPS + Cellular) and price that best suit your budget.