Apple Unveils Apple Watch Series 6 With Blood Oxygen Monitoring and New Color Options - MacRumors
Skip to Content

Apple Unveils Apple Watch Series 6 With Blood Oxygen Monitoring and New Color Options

Apple today announced the new Apple Watch Series 6, sporting several new features including blood oxygen monitoring and multiple color options.

Apple delivers apple watch series 6 09152020 big
Oxygen saturation, or SpO2, represents the percentage of oxygen being carried by red blood cells from the lungs to the rest of the body, and indicates how well this oxygenated blood is being delivered throughout the body.

With Apple Watch Series 6, users can detect their blood oxygen right from their wrist, thanks to advanced algorithms that measure the color of the wearer's blood. To compensate for natural variations in the skin and improve accuracy, the Blood Oxygen sensor employs four clusters of green, red, and infrared LEDs, along with the four photodiodes on the back crystal of Apple Watch, to measure light reflected back from blood.

It's capable of taking readings manually in 15 seconds, plus it gives periodic background readings, including while the user sleeps. The new Blood O2 feature will also support research studies that explore asthma, heart failure, and flu/covid studies.

The Apple Watch Series 6 includes a new sixth-generation chip, with a dual-core processor based on Apple's A13 chip, which is 20 percent faster than the previous generation model.

"Apple Watch Series 6 completely redefines what a watch can do," said Jeff Williams, Apple's chief operating officer. "With powerful new features, including a Blood Oxygen sensor and app, Apple Watch becomes even more indispensable by providing further insight into overall well-being."

In addition, the Series 6 has a 2.5x brighter outdoor always-on display, including an always-on altimeter.

f1600189839
The always-on altimeter provides real-time elevation all day long by using a new, more power-efficient barometric altimeter, along with GPS and nearby Wi-Fi networks. This feature allows for the detection of small elevation changes above ground level, up and down to the measurement of 1 foot, and can be shown as a new watch face complication or workout metric.

Exclusive to the Series 6 is a new blue aluminum case, an updated classic gold stainless steel, and graphite stainless steel, and an Apple Watch PRODUCT(RED).

Apple watch series 6 aluminum red case 09152020 carousel
There are also new watch faces with the Series 6, including a Tachymeter, MeMoji, Stripe faces to show pride, team colors, and more.

watchOS 7 also brings sleep tracking and will also soon give users warnings for low VO2 Max levels.

Apple Watch Series 6 (GPS) starts at $399 and Apple Watch Series 6 (GPS + Cellular) starts at $499.

This story is part of our ongoing coverage of Apple's virtual "Time Flies" event today. Refresh for more details and follow our live blog.

Related Roundup: Apple Watch 11
Buyer's Guide: Apple Watch (Neutral)

Popular Stories

watchos 26 gradient light

watchOS 26.4 Now Available With Workout Update and New Emoji

Tuesday March 24, 2026 10:02 am PDT by
Apple today released watchOS 26.4, the fourth major update to the watchOS 26 operating system that came out in September. watchOS 26.4 comes a month and a half after Apple released watchOS 26.3. watchOS 26.4 can be downloaded for free on an iPhone running iOS 26.4 by opening up the Apple Watch app and going to General > Software Update, or initiating an update in the Settings app on the...
Apple Watch Series 10 Jet Black

No Major Apple Watch Redesign Expected This Year

Thursday March 26, 2026 11:12 am PDT by
In addition to indicating that a new full-sized HomePod is in the works, and that the foldable iPhone will likely ship later than the iPhone 18 Pro models this year, Bloomberg's Mark Gurman today said he does not expect any major design changes for the next-generation Apple Watch models coming later this year. Gurman revealed all of this information in a live Q&A call today on the Bloomberg...
earth day 2025 apple watch

Apple Watch Earth Day and International Dance Day Activity Challenges Launching Later This Month

Tuesday April 14, 2026 12:00 pm PDT by
Apple has two new Apple Watch activity challenges coming up, celebrating Earth Day and International Dance Day. The Earth Day activity challenge will launch on Wednesday, April 22, while the Dance Day challenge will take place a week later on Wednesday, April 29. To complete the Earth Day challenge, Apple Watch owners will need to complete a workout that lasts for 30 minutes or longer. This ...

Top Rated Comments

73 months ago

Perhaps I misread but what is the purpose of the O2 integration of its for studies?

what benefit does it provide to the user?
In the Covid era, it's one of the most important metrics to track. If you get Covid and your O2 sat starts dropping, you need to seek medical attention right away. It could help you to avoid a ventilator and a very bad outcome.
Score: 13 Votes (Like | Disagree)
JDHiro Avatar
73 months ago
Love my S5, but the updates in this generation seem a bit too incremental to justify an update.
Score: 13 Votes (Like | Disagree)
GIZBUG Avatar
73 months ago
This promo video cracks me up. I am waiting for the machine learning voice to say "what about a battery that lasts more than a day on a single charge?" and a person saying "Oh, it doesn't do that!"
Score: 10 Votes (Like | Disagree)
73 months ago
Heart rate, ECG, VO2, and blood oxygen level along with everything else in the watch. It's really mind-blowing how much tech is packed into such a small device...
Score: 9 Votes (Like | Disagree)
QCassidy352 Avatar
73 months ago

Love my S5, but the updates in this generation seem a bit too incremental to justify an update.
Agreed. Blood oxygen, always on altimeter, brighter AOD outdoors, 20% faster. Probably not gonna notice any of that in the day to day.
Score: 8 Votes (Like | Disagree)
TheYayAreaLiving 🎗️ Avatar
73 months ago
Blue is this year's color! can't wait for the iphone!
Score: 8 Votes (Like | Disagree)