What is the difference between Freestyle Libre 3 and Dexcom G7?
- wonacedme
- May 6
- 2 min read
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.
Contact
WONACE Medical Supply is a Medicare-approved company trusted by medical doctors, Healthcare insurance, and clinics.
Visit: WONACE.COM
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