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What is the difference between Freestyle Libre 3 and Dexcom G7?


Insurance-covered Autism Medical Supplies
Freestyle Libre or Dexcom

The FreeStyle Libre 3 and Dexcom G7 are both popular continuous glucose monitors (CGMs), but they differ in terms of features, design, accuracy, and how they are used. Here's a side-by-side breakdown to help you understand the key differences:



1. Sensor Design & Placement

  • FreeStyle Libre 3

    • Sensor size: Very slim and compact (about the size of two stacked pennies)

    • Placement: Back of the upper arm

    • Application: Sensor lasts 14 days

  • Dexcom G7

    • Sensor + transmitter combined into a single, all-in-one device

    • Placement: Back of the upper arm or abdomen (varies by age)

    • Application: Sensor lasts 10 days

2. Real-Time Glucose Readings

  • Libre 3

    • Real-time glucose updates every minute

    • Data is automatically sent to your smartphone via Bluetooth

    • No manual scanning required (unlike earlier Libre models)

  • Dexcom G7

    • Real-time glucose readings every 5 minutes

    • Sends data directly to your smartphone or a compatible receiver

    • Highly customizable alert system

3. Alerts & Notifications

  • Libre 3

    • Has optional glucose alerts (highs/lows)

    • Simpler alert system than Dexcom

  • Dexcom G7

    • Advanced customizable alerts for highs, lows, and trends

    • Predictive alerts available (e.g., 20-min early warning for lows)

4. App Compatibility & Smart Devices

  • Libre 3

    • Works with the FreeStyle Libre 3 app (iOS & Android)

    • Can share data with caregivers via LibreLinkUp

    • Currently, limited smartwatch support

  • Dexcom G7

    • Works with Dexcom app, Apple Watch, and other smartwatches

    • Real-time sharing with up to 10 followers (e.g., parents, caregivers)

5. Accuracy (MARD – Mean Absolute Relative Difference)

  • Libre 3: ~7.9% MARD

  • Dexcom G7: ~8.2% MARD(Both are highly accurate and FDA-cleared for insulin dosing)

6. Warm-up Time

  • Libre 3: 1 hour

  • Dexcom G7: Only 30 minutes (faster startup)

7. Integration with Insulin Pumps

  • Libre 3: Currently limited pump integration

  • Dexcom G7: Better integration with automated insulin delivery (AID) systems like Tandem t: slim X2 and Omnipod 5

8. Cost & Insurance Coverage

  • Both CGMs may be fully covered by insurance (like Blue Cross Blue Shield), depending on your plan and whether the device is billed under medical or pharmacy benefits.

  • WONACE Medical Supply works directly with your healthcare provider and insurance to determine eligibility and deliver your CGM monthly and hassle-free.



Insurance Coverage and Access

Both Dexcom G7 and FreeStyle Libre 3 are often covered by insurance plans, including Blue Cross Blue Shield (BCBS). Coverage can vary based on your specific plan and whether the CGM is billed under medical or pharmacy benefits. It's essential to check with your insurance provider for detailed coverage information.


Get Your CGM Delivered with WONACE Medical Supply

At WONACE Medical Supply, we simplify the process of obtaining your CGM:

  • We work directly with your insurance provider to verify coverage.

  • Handle all necessary paperwork and approvals.

  • Ensure the timely delivery of your CGM supplies to your doorstep.



Want Your CGM Delivered?

📞 Call: 877-787-4705🌐 Visit: wonace.com/diabetes 📧 Email: orders@wonace.com to see if you're eligible to get your Dexcom G7 or FreeStyle Libre 3 covered by insurance and shipped to your door.


Contact WONACE Medical Supply for medical supplies near you.



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WONACE Medical Supply is a Medicare-approved company trusted by medical doctors, Healthcare insurance, and clinics.

Visit: WONACE.COM

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WONACE Medical Supply sells Incontinence, Breast Pumps, Mobility Aids, Wound Care, Diabetes, Respiratory, Bath chairs, Hospital Equipments, Physical therapy equipment, CPAP, scooters, wheelchairs, oxygen, Walkers, and all home healthcare aids supplies, in Houston, TX 77079, Katy, and Cypress area.

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