Apple Watch Series 6 Aluminium

Quick Facts

Item	Details
Launch Year	2020
Case Material	Aluminium
Available Sizes	40mm, 44mm
Display	Always-On LTPO OLED Retina Display (324 × 394 / 368 × 448)
Processor	Apple S6 SiP
Connectivity	GPS or GPS + Cellular
Battery Life	Up to 18 hours
Water Resistance	50m (WR50)
Health Features	Heart Rate, ECG, Blood Oxygen, Fall Detection
Glass	Ion-X Strengthened Glass
Storage	32GB
Weight	30.5g (40mm), 36.5g (44mm)
Compatibility	iPhone only

Overview

The Apple Watch Series 6 Aluminium is a great choice for iPhone users who want advanced health tracking, an Always-On Retina display and faster performance without paying for the latest Apple Watch. It introduces Blood Oxygen monitoring while retaining popular features such as ECG and Fall Detection.

Powered by the Apple S6 SiP, it features an Always-On Retina display, 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. Blood Oxygen Monitoring

Apple Watch Series 6 is the first Apple Watch to support Blood Oxygen monitoring, providing additional health insights alongside ECG and heart rate tracking.

Why it matters

Measures blood oxygen levels
Complements ECG and heart rate monitoring
Supports everyday health tracking

2. Always-On Retina Display

The Always-On Retina display keeps the time and key information visible without raising your wrist.

Why it matters

View the time instantly
Easier to check notifications
Convenient during workouts

3. Faster Apple S6 Performance

The Apple S6 processor delivers quicker app launches and smoother overall performance than previous generations.

Why it matters

Faster app loading
Smoother navigation
Better everyday responsiveness

Key Features Explained

Feature	Specification	Why It Matters
Display	Always-On LTPO OLED Retina Display	Easy to view the time and notifications at a glance
Processor	Apple S6 SiP	Faster and more responsive than previous generations
Battery Life	Up to 18 hours	Suitable for a full day’s typical use
Charging	Magnetic Charging Cable	Convenient magnetic charging
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, Fall Detection	Comprehensive health and fitness tracking
Glass	Ion-X Strengthened Glass	Durable for everyday wear
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 nearby. Choose the GPS + Cellular model if you want to make calls, send messages and access mobile data directly from your watch with a supported carrier and mobile plan.

Compare the Related Models

Feature	Apple Watch Series 5 Aluminium	Apple Watch Series 6 Aluminium	Apple Watch Series 7 Aluminium	Apple Watch SE (2nd Generation) Aluminium
Launch Year	2019	2020	2021	2022
Display	Always-On LTPO OLED Retina	Always-On LTPO OLED Retina	Larger Always-On Retina Display	Retina LTPO OLED
Processor	Apple S5	Apple S6	Apple S7	Apple S8
Health Features	Heart Rate, ECG, Fall Detection, Compass	Heart Rate, ECG, Blood Oxygen, Fall Detection	Heart Rate, ECG, Blood Oxygen, Fall Detection	Heart Rate, Crash Detection, Fall Detection
Battery Life	Up to 18 hours	Up to 18 hours	Up to 18 hours	Up to 18 hours
Storage	32GB	32GB	32GB	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	30.8g / 36.5g	30.5g / 36.5g	32.0g / 38.8g	26.4g / 32.9g

Which Apple Watch Should You Choose?

Model	Recommended For
Apple Watch Series 6 Aluminium	Buyers who want Blood Oxygen monitoring and excellent overall value.
Apple Watch Series 7 Aluminium	Buyers who prefer a larger display and faster charging.
Apple Watch SE (2nd Generation) Aluminium	Buyers who want a newer processor and Crash Detection at a lower price.
Apple Watch Series 5 Aluminium	Buyers looking for an affordable Apple Watch with an Always-On Display.

Alternatives to Apple Watch Series 6 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 6 Aluminium still worth buying?

Yes. The Apple Watch Series 6 Aluminium remains an excellent smartwatch thanks to its Always-On Retina Display, Blood Oxygen monitoring, ECG and reliable fitness tracking. When buying used, check the battery condition and ensure Activation Lock has been removed.

What is the difference between the Apple Watch Series 6 and Series 5?

The Apple Watch Series 6 adds Blood Oxygen monitoring, a faster Apple S6 processor and faster charging. Both models include an Always-On Retina Display, ECG and Fall Detection.

Is the Apple Watch Series 6 Aluminium waterproof?

The Apple Watch Series 6 Aluminium has a 50m (WR50) water resistance rating, making it suitable for swimming. It is not designed for diving or high-pressure water sports. Water resistance may decrease over time on used devices.

Is the Apple Watch Series 6 Aluminium better than the Apple Watch Series 7?

The Apple Watch Series 7 offers a larger display, thinner bezels and faster charging, while the Series 6 already provides Blood Oxygen monitoring, ECG and excellent everyday performance. If you want the latest display design, choose the Series 7. If value is your priority, the Series 6 remains a great option.

Why Buy the Apple Watch Series 6 Aluminium?

The Apple Watch Series 6 Aluminium is one of the best all-round Apple Watches, combining an Always-On Retina Display, Blood Oxygen monitoring, ECG and fast performance in a lightweight aluminium case. Compare Apple Watch Series 6 Aluminium listings on SellUp Marketplace to find the condition, case size, connectivity option (GPS or GPS + Cellular) and price that best suit your budget.