Aura at CES 2019 introduced an Apple Watch "Smart Strap" designed to measure weight, water, fat, and muscle via electrodes built into the band. The strap didn't end up launching in 2019, but Aura says that it's set to launch in March 2020, with pre-orders available now.

The Aura Strap, which is priced at $99, claims to allow users to measure their body composition and track their hydration levels and fitness progress. Aura says the band uses bioimpedance to analyze the upper body, tracking lung performance and changes in breathing, comparing that information with pulse data.

aurastrap1
The band is able to assess the risk of heart failure and notify the user, though this is something that newer Apple Watch models can do on their own without the need for an additional strap. Measuring body composition and hydration is not something the Apple Watch can do on its own, though testing will need to be done to see how accurate the Aura strap is in practice.

aurastrap2
The Aura Strap is available in four color options, including black, green, red, and gray, and it attaches to the Apple Watch using the standard Apple Watch lugs. According to Aura, the strap transfers results to the watch "via an ultrasound interface" and it works for up to six months on a single battery. It has the same waterproof specifications as the watch and is able to sync with HealthKit.

Aura is taking pre-orders for the watch as of today, with the device set to begin shipping out to customers starting in March 2020.

Top Rated Comments

cdcastillo Avatar
79 months ago
I want to see the scientific papers on peer-reviewed journals comparing this with clinical measures. Otherwise, is just wishful thinking and snake oil sales. The papers usually come out 1-2 years after a product comes to market (e.g., there have been 2 in the last few months about the apple watch and A-Fib (one about the HEART study in the NEJM, and other using the apple watch to take a 6 lead precordial EKG in other journal, can't remember the name right now).
Score: 5 Votes (Like | Disagree)
MareLuce Avatar
79 months ago
All that but no pulse ox measurement?
Score: 2 Votes (Like | Disagree)
44267547 Avatar
79 months ago
Interesting technology, albeit I question the accuracy. I suspect Apple probably Will release their own version of a watch band like this in the future similarly.

But I think it’s very clear other manufacturers are seeing Apples leading with health related features, thus following by releasing products like this.
Score: 1 Votes (Like | Disagree)
gugy Avatar
79 months ago
Looks interesting. I’ll wait until reviews comes out.
Score: 1 Votes (Like | Disagree)
Dmitrii Avatar
79 months ago

I want to see the scientific papers on peer-reviewed journals comparing this with clinical measures. Otherwise, is just wishful thinking and snake oil sales. The papers usually come out 1-2 years after a product comes to market (e.g., there have been 2 in the last few months about the apple watch and A-Fib (one about the HEART study in the NEJM, and other using the apple watch to take a 6 lead precordial EKG in other journal, can't remember the name right now).

If you can find this please update us!!
The Aura technology detects the RISK of heart failure before its development, i.e. in advance but does not make the diagnosis of AF after its development as in "new Apple Watch models". This is something different as can be seen from the US patent:
http://patft.uspto.gov/netacgi/nph-Parser?Sect1=PTO2&Sect2=HITOFF&p=1&u=%2Fnetahtml%2FPTO%2Fsearch-bool.html&r=1&f=G&l=50&co1=AND&d=PTXT&s1=10463260.PN.&OS=PN/10463260&RS=PN/10463260
Score: 1 Votes (Like | Disagree)

Popular Stories

Apple Creator Studio

Apple Introduces New 'Creator Studio' Bundle of Apps for $129 Per Year

Tuesday January 13, 2026 6:11 am PST by
Apple today introduced a new Apple Creator Studio bundle that offers access to six creative apps, as well as exclusive AI features and content, as part of a single subscription. In the U.S., pricing is set at $12.99 per month or $129 per year. Here are the six apps included with an Apple Creator Studio subscription:Final Cut Pro on the Mac and iPad Logic Pro on the Mac and iPad Pixelmator...
Low Cost MacBook Feature A18 Pro

Apple Is Expected to Launch These Four MacBooks in 2026

Friday January 9, 2026 8:17 am PST by
2026 could be a bumper year for Apple's Mac lineup, with the company expected to announce as many as four separate MacBook launches. Rumors suggest Apple will court both ends of the consumer spectrum, with more affordable options for students and feature-rich premium lines for users that seek the highest specifications from a laptop. Subscribe to the MacRumors YouTube channel for more videos. ...
iOS 18 Siri Personal Context

Apple Confirms Google Gemini Will Power Next-Generation Siri This Year

Monday January 12, 2026 7:38 am PST by
In a statement shared with CNBC today, Apple confirmed that Google Gemini will power the next-generation version of Siri that is slated to launch later this year. "After careful evaluation, we determined that Google's technology provides the most capable foundation for Apple Foundation Models and we're excited about the innovative new experiences it will unlock for our users," the statement...
iPhone Top Left Hole Punch Face ID Feature Purple

10 Reasons to Wait for This Year's iPhone 18 Pro

Thursday January 8, 2026 2:56 am PST by
Apple's iPhone development roadmap runs several years into the future and the company is continually working with suppliers on several successive iPhone models at the same time, which is why we often get rumored features months ahead of launch. The iPhone 18 series is no different, and we already have a good idea of what to expect for the iPhone 18 Pro and iPhone 18 Pro Max. One thing worth...
iOS 26

Here's What's New in iOS 26.3 So Far

Monday January 12, 2026 1:15 pm PST by
Apple today seeded the second beta of iOS 26.3, nearly a month after the first beta. So far, the update includes a couple of new features for iPhones. iOS 15.3 through iOS 18.3 were all released in late January over the years, so it is thereby likely that iOS 26.3 will be released towards the end of this month as well. The update is compatible with the iPhone 11 series and newer. Below,...
iOS 18 Siri Personal Context

Elon Musk Reacts to Apple and Google Teaming on Gemini-Powered Siri

Monday January 12, 2026 11:38 am PST by
Elon Musk today expressed concern about Apple and Google partnering on a more personalized version of Siri powered by Google's generative AI platform Gemini. "This seems like an unreasonable concentration of power for Google, given that [they] also have Android and Chrome," wrote Musk, in a post on X. Musk serves as CEO of xAI, the company behind Gemini competitor Grok. It is unlikely...
fcp pcp iwork creator studio

These Apple Apps Will No Longer Receive All New Features Without a Subscription

Tuesday January 13, 2026 10:50 am PST by
If you are not interested in subscribing to the new Apple Creator Studio bundle introduced today, you will officially start to miss out on some new features. Apple said some "exciting new intelligent features and premium content" in Final Cut Pro, Pixelmator Pro, Keynote, Numbers, Pages, and Freeform will only be accessible with a Creator Studio subscription. In the U.S., a subscription...
Apple Intelligence iPhone 16

Google Gemini Partnership With Apple Will Go Beyond Siri Revamp

Monday January 12, 2026 8:48 am PST by
Apple and Google today announced that Google Gemini will help power not only a more personalized version of Siri, but a range of future Apple Intelligence features. "Apple and Google have entered into a multi-year collaboration under which the next generation of Apple Foundation Models will be based on Google's Gemini models and cloud technology," the companies said, in a statement. "These...
iOS 26

iOS 26.2.1 Update Coming Soon for iPhones

Monday January 12, 2026 8:19 am PST by
iOS 26.3 will likely be released to the public later this month, but it appears that Apple is preparing to push out another software update in the interim. Apple's software engineers have started testing iOS 26.2.1, according to the MacRumors visitor logs, which have been a reliable indicator of upcoming iOS versions. The update will likely be released at some point this week or next week. ...