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

iOS 26

iOS 26.4 Adds Two New Features to CarPlay

Tuesday March 24, 2026 1:55 pm PDT by
iOS 26.4 was released today, and it includes a couple of new features for CarPlay: an Ambient Music widget and support for voice-based chatbot apps. To update your iPhone 11 or newer to iOS 26.4, open the Settings app and tap on General → Software Update. CarPlay will automatically offer the new features so long as the iPhone connected to your vehicle is running iOS 26.4 or later....
Apple Business hero

Apple Unveils 'Apple Business' All-in-One Platform

Tuesday March 24, 2026 8:53 am PDT by
Apple today announced Apple Business, a new all-in-one platform that unifies device management, productivity tools, and customer outreach features. The service is designed to be a consolidated replacement for several of Apple's existing business-focused offerings, including Apple Business Essentials, Apple Business Manager, and Apple Business Connect. It provides organizations with a single...
AirPods Pro Firmware Feature

Apple Releases New Firmware for AirPods Pro 3, AirPods Pro 2 and AirPods 4

Tuesday March 24, 2026 12:31 pm PDT by
Apple today released new firmware for the AirPods Pro 2, AirPods Pro 3, and the AirPods 4. The firmware has a version number of 8B39, up from 8B34 on the AirPods Pro 3, 8B28 on the AirPods Pro 2, and 8B21 on the AirPods 4. There is no word on what's included in the firmware, but Apple has a support document with limited notes. Most updates are limited to bug fixes and performance...

Top Rated Comments

72 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
72 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
72 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)
72 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
72 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
72 months ago
Blue is this year's color! can't wait for the iphone!
Score: 8 Votes (Like | Disagree)