A watch that measures glucose without drawing blood could reach millions who wouldn't otherwise test.
At the intersection of consumer technology and public health, Apple is reportedly preparing to give its Watch the ability to measure blood sugar without breaking skin — a capability that, if realized, could quietly transform how millions of people first encounter a diabetes diagnosis. The move follows a deliberate evolution: a device once sold as a notification tool has become a medical instrument, step by careful step. With Samsung pursuing the same frontier simultaneously, the wrist has become the newest contested ground in the long human effort to know what is happening inside our own bodies.
- Non-invasive blood glucose monitoring — long a holy grail of health technology — may finally arrive on consumer wrists as early as 2021, with both Apple and Samsung racing to deliver it.
- Over 26 million Americans are estimated to be living with undiagnosed diabetes, giving this feature stakes that extend well beyond a product launch.
- Apple's own CEO once resisted FDA entanglement to protect the Watch's innovation pace, but mounting customer demand has steadily pulled the company deeper into clinical territory.
- The critical uncertainty is reliability — engineers are still determining whether existing infrared hardware can produce readings accurate enough to be meaningful.
- Apple's pattern of locking new health features to premium models signals that blood sugar monitoring, if it arrives, may function as an upgrade incentive as much as a public health tool.
Apple is reportedly planning to bring non-invasive blood sugar sensing to the Apple Watch Series 7, using infrared technology to measure glucose levels without a finger prick. Korean tech outlet ET News suggests the feature could arrive later in 2021, coinciding with Samsung's similar effort in the Galaxy Watch 4.
The Apple Watch's health journey has been one of gradual, deliberate expansion. It launched as a notification device, but Apple quickly recognized that health and fitness were the real reasons people bought it. Tim Cook once expressed reluctance to submit the Watch to FDA scrutiny, fearing it would slow innovation — yet the company has since added ECG, atrial fibrillation detection, and blood oxygen measurement across successive models. A glucose sensor would be the most consequential step yet.
The human stakes are real. More than 10% of Americans have diabetes, and the American Diabetes Association estimates over 26 million cases go undiagnosed. A wearable capable of flagging abnormal glucose levels could prompt people to seek testing before serious harm sets in.
Apple has reportedly secured relevant patents and is now focused on ensuring the sensor performs reliably — an open question, since it remains unclear whether current infrared hardware is sufficient. What is clearer is the company's commercial logic: Apple has a history of reserving new health capabilities for its latest models, even when older hardware could theoretically support them. If blood sugar monitoring reaches consumers, it will likely arrive as a marquee feature — one designed as much to justify an upgrade as to advance the cause of preventive health.
Apple is reportedly planning to add a blood sugar sensor to the Apple Watch Series 7, according to Korean tech reporting. The sensor would work without drawing blood—using infrared technology instead—and could arrive later in 2021 alongside Samsung's similar feature in the Galaxy Watch 4.
The move represents a significant expansion of the Apple Watch's health ambitions. When the device first launched, Apple marketed it primarily as a notification hub. But the company quickly realized that health and fitness features were what actually drove people to buy the watch, and the product strategy shifted accordingly. Tim Cook, Apple's CEO, had once expressed caution about pursuing medical capabilities, worried that FDA approval processes would slow innovation. "I wouldn't mind putting something adjacent to the watch through it, but not the watch, because it would hold us back from innovating too much," he said at the time. That stance changed as customer demand mounted. Apple added ECG functionality and atrial fibrillation detection to the Watch in 2018, then blood oxygen measurement to the Series 6 last year.
A blood sugar sensor would be a logical next step. More than 10% of Americans have diabetes, and the American Diabetes Association estimates that over 26 million cases go undiagnosed. A wearable that could detect glucose levels without a finger prick could prompt people to seek formal testing and treatment—potentially catching disease before it causes serious harm.
According to ET News, Apple has already secured patent technology for the feature and is now focused on ensuring the sensor works reliably. The company is exploring whether its existing infrared sensor could double as a glucose detector, though it's unclear whether current hardware would be sufficient. Samsung is taking a similar approach with the Galaxy Watch 4, using optical sensors to measure blood glucose without blood collection.
Apple has a history of reserving new health features for premium models. The heart rate sensor in all Apple Watches can detect blood oxygen levels, but Apple made that capability exclusive to the Series 6. Even if the same infrared sensor could measure blood sugar on older devices, the company might restrict it to the Series 7 anyway—a strategy that encourages customers to upgrade. The company's cautious approach to medical features, combined with its tendency to gate capabilities by model, suggests that if this technology reaches consumers, it may arrive as a marquee feature designed to justify the cost of a new device.
Citações Notáveis
I wouldn't mind putting something adjacent to the watch through it, but not the watch, because it would hold us back from innovating too much.— Tim Cook, on FDA approval concerns
A Conversa do Hearth Outra perspectiva sobre a história
Why does Apple care about blood sugar measurement specifically? There are already home glucose monitors.
True, but those require finger pricks and a separate device. A watch that measures glucose without drawing blood could reach people who wouldn't otherwise test—especially the 26 million Americans who don't know they have diabetes yet. It's about making the test frictionless enough that people actually do it.
So this is about early detection, not replacing medical devices?
Exactly. Apple isn't trying to be a diabetes management tool. It's trying to be the thing that catches you before you know you need management. That's where the public health value sits.
Why did Cook change his mind about FDA approval?
Customer demand. The watch was selling because of health features, not notifications. Cook realized that avoiding FDA scrutiny meant leaving money and impact on the table. So Apple started pursuing medical certifications—ECG in 2018, blood oxygen in 2020. This is the next logical step.
Will this actually work? Infrared sensors measuring glucose?
That's the question Apple is apparently still answering. They have the patents. They're focused on reliability now. Whether it's accurate enough to matter—that's what they're testing before release.
Why would Samsung and Apple both launch this at the same time?
They're both chasing the same market opportunity. Wearables are becoming health devices. Whoever gets there first with a working non-invasive glucose sensor wins a category. Samsung's moving fast too.