New Study Suggests Apple Watch Heart Rate Sensor Can Detect Early Signs of Diabetes

Cardiogram, a company that offers an app able to break down heart rate data collected by the Apple Watch, today shared the results of a new study that suggests the Apple Watch can be used to detect the signs of diabetes.

Cardiogram researchers teamed up with the University of California, San Francisco and used the Cardiogram DeepHeart neural network to determine that heart rate data collected from the Apple Watch was 85 percent accurate at distinguishing between people with diabetes and people without diabetes.

applewatchheartrate2
For the study, Cardiogram used more than 200 million sensor measurements from 14,011 participants using an Apple Watch or Android Wear device and the Cardiogram app, aggregating data that included heart rate, step count, and other activity.

Prediabetes is a condition that often goes unnoticed and undiagnosed because traditional methods of detection require glucose-sensing hardware. Detection via the Apple Watch and an AI-based algorithm like Cardiogram's DeepHeart has the potential to alert users that there's an issue so they can then follow up with a medical professional.

According to Cardiogram, its study is the first large-scale study that demonstrates how an ordinary heart rate sensor, like the one in the Apple Watch and other devices like the Fitbit, can detect early signs of diabetes. Because the pancreas is connected to the heart through the nervous system, the heart rate variability changes when a person begins experiencing diabetes symptoms.

Over the course of the last year, Cardiogram and UCSF have teamed up to do a lot of research into the potential for wrist-worn heart rate sensors to detect serious health conditions. Previous studies have shown the Apple Watch heart rate sensor's ability to detect conditions that include hypertension, sleep apnea, and atrial fibrillation.

While there's still a long way to go before research proves whether the Apple Watch can officially detect early health problems, Cardiogram plans to implement new features to incorporate DeepHeart directly into the Cardiogram app in the future, which will allow users to be alerted if early signs of disease are detected.

Apple has also launched its own study in partnership with Stanford to determine whether the heart rate sensor in the Apple Watch can be used to detect abnormal heart rhythms and common heart conditions.

You can sign up to participate in the Apple Heart Study by downloading and installing the Apple Heart Study app and wearing the Apple Watch on a regular basis. If the Apple Watch detects an irregular heart rhythm, you'll be contacted by researchers and may be asked to wear an ePatch monitor.

You can also participate in Cardiogram's studies by installing the Cardiogram app and signing up to join the mRhythm study.

Related Roundup: Apple Watch 10
Buyer's Guide: Apple Watch (Caution)

Popular Stories

Apple Watch Ultra Night Mode Screen

Apple Watch Ultra 3 Launching Later This Year With Two Key Upgrades

Wednesday July 2, 2025 1:13 pm PDT by
The long wait for an Apple Watch Ultra 3 appears to be nearly over, and it is rumored to feature both satellite connectivity and 5G support. Apple Watch Ultra's existing Night Mode In his latest Power On newsletter, Bloomberg's Mark Gurman said that the Apple Watch Ultra 3 is on track to launch this year with "significant" new features, including satellite connectivity, which would let you...
iPhone 17 Pro in Hand Feature Lowgo

iPhone 17 Pro Max Battery Capacity Leaked

Thursday July 3, 2025 5:40 am PDT by
The iPhone 17 Pro Max will feature the biggest ever battery in an iPhone, according to the Weibo leaker known as "Instant Digital." In a new post, the leaker listed the battery capacities of the iPhone 11 Pro Max through to the iPhone 16 Pro Max, and added that the iPhone 17 Pro Max will feature a battery capacity of 5,000mAh: iPhone 11 Pro Max: 3,969mAh iPhone 12 Pro Max: 3,687mAh...
iPhone 17 Pro in Hand Feature Lowgo

iPhone 17 Pro Coming Soon With These 14 New Features

Friday July 4, 2025 1:05 pm PDT by
Apple's next-generation iPhone 17 Pro and iPhone 17 Pro Max are just over two months away, and there are plenty of rumors about the devices. Below, we recap key changes rumored for the iPhone 17 Pro models. Latest Rumors These rumors surfaced in June and July:Apple logo repositioned: Apple's logo may have a lower position on the back of the iPhone 17 Pro models, compared to previous...
iPhone 17 Pro Lower Logo Magsafe

iPhone 17 Pro's New MagSafe Design Revealed in Leaked Photo

Wednesday July 2, 2025 8:37 am PDT by
The upcoming iPhone 17 Pro and iPhone 17 Pro Max are rumored to have a slightly different MagSafe magnet layout compared to existing iPhone models, and a leaked photo has offered a closer look at the supposed new design. The leaker Majin Bu today shared a photo of alleged MagSafe magnet arrays for third-party iPhone 17 Pro cases. On existing iPhone models with MagSafe, the magnets form a...
airpods pro 2

AirPods Pro 3 to Help Maintain Apple's Place in Earbud Market Amid Increasing Low-Cost Competition

Thursday July 3, 2025 7:25 am PDT by
Apple's position as the dominant force in the global true wireless stereo (TWS) earbud market is expected to continue through 2025, according to Counterpoint Research. The forecast outlines a 3% year-over-year increase in global TWS unit shipments for 2025, signaling a transition from rapid growth to a more mature phase for the category. While Apple is set to remain the leading brand by...
Wi Fi WiFi General Feature

iOS 26 Adds a Useful New Wi-Fi Feature to Your iPhone

Wednesday July 2, 2025 6:36 am PDT by
iOS 26 and iPadOS 26 add a smaller yet useful Wi-Fi feature to iPhones and iPads. As spotted by Creative Strategies analyst Max Weinbach, sign-in details for captive Wi-Fi networks are now synced across iPhones and iPads running iOS 26 and iPadOS 26. For example, while Weinbach was staying at a Hilton hotel, his iPhone prompted him to fill in Wi-Fi details from his iPad that was already...
iOS 18

Apple Releases Second iOS 18.6 Public Beta

Tuesday July 1, 2025 10:19 am PDT by
Apple today seeded the second betas of upcoming iOS 18.6 and iPadOS 18.6 updates to public beta testers, with the betas coming just a day after Apple provided the betas to developers. Apple has also released a second beta of macOS Sequoia 15.6. Testers who have signed up for beta updates through Apple's beta site can download iOS 18.6 and iPadOS 18.6 from the Settings app on a compatible...

Top Rated Comments

Herky68 Avatar
97 months ago
I believe that many of you don't understand just how much effort and expense apple has spent on developing this research program. I signed up late last year, and several weeks ago they notified me that they had read an irregular heart rhythm on my app. I called them, talked to a Dr. on line, they sent me a state of the art medical monitor the size of an Apple watch which is applied with a sticky tape over my heart for 7 days, I kept it attached for a week, sent it back (post payed) and they contacted me within 3 days, they had me contact one of their research Drs. who went over the results of the week long monitor, they saw no further arrhythmia , and gave me confidence that the earlier abnormal pattern was not a problem , readings showed my heart strong, and healthy. My heart has a minor abnormal pattern that I have known about for 45 years, and I've had numerous heart evaluations required by my employers. I have worn a Holter Monitor numerous times, it's bulky , hard to sleep with, and only records a day or two, the device that Apple sent me totally blew me away, light, you can shower with it on, and records on an internal chip an entire week of heart activity. Please give Apple the respect they deserve for truly using their research budget to start the next generation of wearable health monitors. Yes, I'm a Fan.
Score: 21 Votes (Like | Disagree)
coolfactor Avatar
97 months ago
Or you could have your doctor test your blood sugar every few months or whenever, thereby catching pre-diabetes early enough to perhaps prevent the full blown thing.
Or you could do both. It's not about choosing one or the other, but integrating daily monitoring into one's life without any additional inconveniences.
Score: 19 Votes (Like | Disagree)
BigMcGuire Avatar
97 months ago
Just signed up for the app and study. Kinda cool how it shows your stats versus other people your age. Also signed up for the heart study. I’m in the Apple Heart Study as well. Hope it helps someone.
Score: 8 Votes (Like | Disagree)
Apple_Robert Avatar
97 months ago
Like Big Mac, I just signed up and am now in both studies. I am all for being a lab rat if it can help me or someone else.
Score: 7 Votes (Like | Disagree)
ghanwani Avatar
97 months ago
So, um, will it tell me if I need to eat less meat? Eat more veggies? Drink better beer? Drink more water? Screw better chicks? :eek:

This kind of stuff is approaching clairvoyant...
It won't tell you what to do. It will tell your insurance company what you've been doing...
Score: 5 Votes (Like | Disagree)
OldSchoolMacGuy Avatar
97 months ago
Who “believed” that? Unless Apple said an oximeter was under development, why should anyone take issue with that not being available three generations later?
Some people don't understand what they word "rumor" means. They take everything printed on the internet to be fact and then get mad when it doesn't come true.
Score: 4 Votes (Like | Disagree)