Best Blood Glucose Monitor Watch in 2025: Comparison & Review

Managing blood glucose levels is essential for people with diabetes. While traditional methods involve finger-prick tests, wearable technology is advancing toward non-invasive glucose monitoring. However, as of now, the FDA has not approved any smartwatches for independent blood glucose measurement. Some smartwatches integrate with continuous glucose monitoring (CGM) systems, displaying real-time data from an external sensor. This article compares the best blood glucose monitor watch that support such integrations: the Apple Watch Series 9, Samsung Galaxy Watch 6, and Garmin Vívoactive 5.

One emerging device, the K’Watch Glucose, claims to offer a non-invasive solution, but its availability and approval status remain uncertain. In this comparison, we evaluate the Apple Watch Series 9, Samsung Galaxy Watch 6, Garmin Vívoactive 5, and K’Watch Glucose.

Best Blood Glucose Monitor Watch

	PRICE	PROS	CONS
K’Watch Glucose (not yet available)	Buy	Non-invasive glucose tracking (if… Potentially game-changing for diabetes…	Not FDA-approved yet Availability uncertain Accuracy and reliability unproven
Apple Watch Series 9	$399.00 $329.00 18% Buy	High-end display & health… Works with major CGM…	Requires separate CGM device Limited battery life
Samsung Galaxy Watch 6	$299.99 $209.99 30% Buy	Bright, clear display Longer battery life than…	Requires separate CGM device Best performance within Samsung’s…
Garmin Vívoactive 5	$299.99 $240.29 20% Buy	Durable with long battery… Good for athletes	Requires separate CGM device Basic smart features compared…

K’Watch Glucose (not yet available)

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Key Features

• Glucose Monitoring: Non-invasive, continuous glucose tracking (pending regulatory approval)
• Display: E-ink or OLED touchscreen
• Sensors: Patented biosensor for glucose estimation
• Compatibility: Standalone device, no need for CGM
• Battery Life: Estimated multi-day use
• Water Resistance: Expected but not confirmed

Who is this best for?

K’Watch Glucose is aimed at people with diabetes who seek non-invasive glucose monitoring. If proven effective, it could revolutionize diabetes management by eliminating the need for traditional CGM sensors or finger pricks.

Customer Feedback Summary

As of now, no widespread user reviews are available, as the watch is still under development. Initial reports suggest excitement but skepticism about its accuracy and availability.

PROS

• Non-invasive glucose tracking (if it works)
• Potentially game-changing for diabetes management

CONS

• Not FDA-approved yet
• Availability uncertain
• Accuracy and reliability unproven

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Apple Watch Series 9

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Key Features

• Glucose Monitoring: Compatible with Dexcom G7, FreeStyle Libre (via apps)
• Display: Retina LTPO OLED
• Sensors: Heart rate, ECG, blood oxygen
• Compatibility: iOS
• Battery Life: Up to 18 hours
• Water Resistance: 50 meters

Who is this best for?

Perfect for iPhone users who use a CGM system like Dexcom or Freestyle Libre to track their glucose levels via apps.

Customer Feedback Summary

Users appreciate the seamless iOS integration and comprehensive health tracking, but many wish for longer battery life.

PROS

• High-end display & health tracking
• Works with major CGM systems

CONS

• Requires separate CGM device
• Limited battery life

$399.00

$329.00

18%

Buy in Amazon

Samsung Galaxy Watch 6

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Key Features

• Glucose Monitoring: Compatible with Dexcom G7, FreeStyle Libre (via apps)
• Display: Super AMOLED
• Sensors: Heart rate, ECG, blood oxygen
• Compatibility: Android
• Battery Life: Up to 40 hours
• Water Resistance: 50 meters

Who is this best for?

Ideal for Android users using a CGM device for real-time glucose monitoring via apps.

Customer Feedback Summary

Praised for its brilliant display and long battery life, but some users note that certain health features are optimized for Samsung devices.

PROS

• Bright, clear display
• Longer battery life than Apple Watch

CONS

• Requires separate CGM device
• Best performance within Samsung’s ecosystem

$299.99

$209.99

30%

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Garmin Vívoactive 5

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Key Features

• Glucose Monitoring: Can display CGM data via compatible apps
• Display: Transflective memory-in-pixel (MIP)
• Sensors: Heart rate, Pulse Ox
• Compatibility: iOS and Android
• Battery Life: Up to 7 days
• Water Resistance: 50 meters

Who is this best for?

Fitness enthusiasts looking for a long-lasting battery smartwatch with basic CGM app integration.

Customer Feedback Summary

Users love the durability and extended battery life, but the display is not as sharp as OLED models.

PROS

• Durable with long battery life
• Good for athletes

CONS

• Requires separate CGM device
• Basic smart features compared to competitors

$299.99

$240.29

20%

Buy in Amazon

Comparison Table Glucose Monitor Watch

Buyer’s Guide: Choosing the Right Blood Glucose Monitor Watch

🔹 CGM Compatibility

Most smartwatches do not measure blood glucose directly but sync with CGM devices like Dexcom G7 or FreeStyle Libre via apps. Ensure your smartwatch is compatible with your CGM system.

🔹 Battery Life

If you prefer longer battery life, consider Garmin Vívoactive 5. Samsung Galaxy Watch 6 also offers a longer duration than the Apple Watch Series 9.

🔹 Non-Invasive Monitoring

K’Watch Glucose claims to offer direct, non-invasive glucose monitoring, but its accuracy and approval status remain uncertain.

🔹 Operating System

• iPhone users: Apple Watch Series 9
• Android users: Samsung Galaxy Watch 6
• Universal option: Garmin Vívoactive 5

FAQs Glucose Monitor Watch

❓ Can I measure blood glucose directly with a smartwatch?

No smartwatch has FDA approval for independent glucose measurement. They require CGM devices like Dexcom or FreeStyle Libre.

❓ When will K’Watch Glucose be available?

The release date and FDA approval status remain uncertain.

❓ Which smartwatch has the best battery life?

Garmin Vívoactive 5 lasts up to 7 days, making it the best option for battery life.

❓ Is a smartwatch better than a CGM?

No. A smartwatch can display CGM data, but it does not replace CGM devices.

Conclusion: Best Blood Glucose Monitor Watch

• 🔹 Best for Non-Invasive Monitoring (Potentially) → K’Watch Glucose (If Approved)
• 🔹 Best for iPhone Users with CGM → Apple Watch Series 9
• 🔹 Best for Android Users with CGM → Samsung Galaxy Watch 6
• 🔹 Best for Battery Life & Fitness Tracking → Garmin Vívoactive 5

While K’Watch Glucose could be a game-changer, Apple, Samsung, and Garmin smartwatches remain the best current options for CGM users.