Apple CEO Tim Cook Spotted Testing Apple Watch-Connected Glucose Monitor

Apple CEO Tim Cook has allegedly been spotted testing a prototype glucose monitor that's connected to his Apple Watch, reports CNBC. Cook, who is said to be aiming to understand how his blood sugar is affected by food and exercise, has been seen wearing the device around the Apple Campus.

Cook also mentioned the glucose monitor in a February meeting with students at the University of Glasgow. It's not clear if the device he spoke of in Glasgow is the same one he's been wearing around the Apple campus.

"I've been wearing a continuous glucose monitor for a few weeks," he said. "I just took it off before coming on this trip."

Cook explained that he was able to understand how his blood sugar responded to foods he was eating. He made modifications to keep his blood sugar more constant.

Current continuous glucose monitoring systems require a small sensor that's worn under the skin to monitor glucose levels. Advanced systems from Dexcom include a transmitter, which can display glucose information directly on an iPhone or Apple Watch.

dexcomcontinuousglucosemonitoring

An iPhone-connected Dexcom continuous glucose monitoring system

Rumors have suggested glucose monitoring is the next major health issue Apple is aiming to tackle. The company is said to have a team of biomedical engineers working on developing sensors for non-invasively monitoring blood sugar levels. Apple is allegedly working on a continuous monitoring solution that would not require an under-skin sensor.

Apple's glucose testing is reportedly far enough along that the company has started conducting feasibility trials at clinical sites in the San Francisco Bay Area, and consultants have been hired to sort out regulatory issues.

According to a recent rumor from BGR, Apple could be planning to add a non-invasive glucose monitoring sensor to a future version of the Apple Watch, perhaps through the addition of a smart band that would add functionality to the Apple Watch without requiring the sensor to be built into the watch.

Cook has said in the past that Apple does not want to put the Apple Watch through the FDA approval process, something that would need to happen for Apple to introduce a glucose monitor, so a modular add-on smart band could be an ideal solution for adding more advanced health tracking features without subjecting the Apple Watch itself to FDA oversight.

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

Popular Stories

iOS 26 Feature

iOS 26.1 to iOS 26.4 Will Add These New Features to Your iPhone

Saturday October 18, 2025 11:00 am PDT by
iOS 26 was released last month, but the software train never stops, and iOS 26.1 beta testing is already underway. So far, iOS 26.1 makes both Apple Intelligence and Live Translation on compatible AirPods available in additional languages, and it includes some other minor changes across the Apple Music, Calendar, Photos, Clock, and Safari apps. More features and changes will follow in future ...
ios 26 1 liquid glass opaque

iOS 26.1 Beta 4 Lets Users Control Liquid Glass Transparency with New Toggle

Monday October 20, 2025 10:57 am PDT by
With the fourth betas of iOS 26.1, iPadOS 26.1, and macOS 26.1, Apple has introduced a new setting that's designed to allow users to customize the look of Liquid Glass. The toggle lets users select from a clear look for Liquid Glass, or a tinted look. Clear is the current Liquid Glass design, which is more transparent and shows the background underneath buttons, bars, and menus, while tinted ...
iphone air thickness

Apple Said to Cut iPhone Air Production Amid Underwhelming Sales

Friday October 17, 2025 8:29 am PDT by
Apple plans to cut production of the iPhone Air amid underwhelming sales performance, Japan's Mizuho Securities believes (via The Elec). The Japanese investment banking and securities firm claims that the iPhone 17 Pro and iPhone 17 Pro Max are seeing higher sales than their predecessors during the same period last year, while the standard iPhone 17 is a major success, performing...
iOS 26

iOS 26.0.2 Update for iPhones Coming Soon

Friday October 17, 2025 7:35 am PDT by
Apple's software engineers continue to internally test iOS 26.0.2, according to MacRumors logs, which have been a reliable indicator of upcoming iOS versions. iOS 26.0.2 will be a minor update that addresses bugs and/or security vulnerabilities, but we do not know any specific details yet. The update will likely be released by the end of next week. Last month, Apple released iOS 26.0.1,...
Apple iPad Pro hero M5

New iPad Pro Has Six Key Upgrades Beyond M5 Chip

Saturday October 18, 2025 10:57 am PDT by
While the new iPad Pro's headline feature is the M5 chip, the device has some other changes, including N1 and C1X chips, faster storage speeds, and more. With the M5 chip, the new iPad Pro has up to a 20% faster CPU and up to a 40% faster GPU compared to the previous model with the M4 chip, according to Geekbench 6 results. Keep in mind that 256GB and 512GB configurations have a 9-core CPU,...
iPhone Siri Glow

Some Apple Employees Have 'Concerns' About iOS 26.4's Revamped Siri

Sunday October 19, 2025 7:39 am PDT by
iOS 26.4 is expected to introduce a revamped version of Siri powered by Apple Intelligence, but not everyone is satisfied with how well it works. In his Power On newsletter today, Bloomberg's Mark Gurman said some of Apple's software engineers have "concerns" about the overhauled Siri's performance. However, he did not provide any specific details about the shortcomings. iOS 26.4 will...
HomePod mini and Apple TV

Apple's Next Rumored Products: New HomePod Mini, Apple TV, and More

Thursday October 16, 2025 9:13 am PDT by
Apple on Wednesday updated the 14-inch MacBook Pro, iPad Pro, and Vision Pro with its next-generation M5 chip, but previous rumors have indicated that the company still plans to announce at least a few additional products before the end of the year. The following Apple products have at one point been rumored to be updated in 2025, although it is unclear if the timeframe for any of them has...
maxresdefault

Here's How the iOS 26.1 Transparency Toggle Changes Liquid Glass

Monday October 20, 2025 1:55 pm PDT by
With the fourth beta of iOS 26.1, Apple added a toggle that makes Liquid Glass more opaque and reduces transparency. We tested the beta to see where the toggle works and what it looks like. Subscribe to the MacRumors YouTube channel for more videos. If you have the latest iOS 26.1 beta, you can go to Settings > Display and Brightness to get to the new option. Tap on Liquid Glass, then...
m4 macbook air blue

M5 MacBook Air Coming Spring 2026 With M5 Mac Studio and Mac Mini in Development

Thursday October 16, 2025 3:57 pm PDT by
Apple plans to launch MacBook Air models equipped with the new M5 chip in spring 2026, according to Bloomberg's Mark Gurman. Apple is also working on M5 Pro and M5 Max MacBook Pro models that will come early in the year. Neither the MacBook Pro models nor the MacBook Air models are expected to get design changes, with Apple focusing on simple chip upgrades. In the case of the MacBook Pro, a m...

Top Rated Comments

barkomatic Avatar
110 months ago
Medical and fitness uses are still the best use cases for the Apple Watch. It would be wonderful if one day it could also reliably detect heart problems before a heart attack.
Score: 19 Votes (Like | Disagree)
itsmilo Avatar
110 months ago
So where them pics at if he was spotted with it
Score: 17 Votes (Like | Disagree)
UL2RA Avatar
110 months ago
Good guy Tim Cook and his glucose monitor. Glucose monitors are the next big thing (tm) and a must have if you want to be cool, just like good guy Cook. However, an alcohol level monitor would certainly be useful to more people, including hipsters.
I can't find anything of value in this entire post.
Score: 15 Votes (Like | Disagree)
BMcCoy Avatar
110 months ago
They may be trying to avoid FDA on the watch, but any glucose monitoring 'device', even if built within a strap, will need some serious regulatory approvals, trials and evidence before it could be used for medical purposes.

And I hope they're doing that, because this is really exciting.
Score: 14 Votes (Like | Disagree)
DragonRider Avatar
110 months ago
Take my money and I'll help test this!!!
Score: 9 Votes (Like | Disagree)
djcerla Avatar
110 months ago
This breakthrough will translate in hundreds of millions of Watches (and iPhones) sold.
Score: 8 Votes (Like | Disagree)