Key Takeaways:
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Both the Dexcom G7 and FreeStyle Libre 3 offer high accuracy and provide reliable glucose monitoring.
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The Dexcom G7 features a 10-day sensor lifespan with a 12-hour grace period, while the FreeStyle Libre 3 System offers 14 days, and an hour warm up time.
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The Dexcom G7 is waterproof for 24 hours at 8 feet and is suitable for users aged 2 and up, while the FreeStyle Libre 3 System is waterproof for 30 minutes at 30 feet and is approved for users ages 4 and older.
Having the right continuous glucose monitoring (CGM) system can make all the difference in managing diabetes.
The Dexcom G7 and FreeStyle Libre 3 System are two of the latest and most advanced CGMs on the market, offering innovative features designed to improve glucose monitoring for patients.
Choosing between them can be challenging, but understanding their unique features and benefits will help you determine which one best suits your needs.
What Are Continuous Glucose Monitoring Systems?
CGMs measure glucose levels throughout the day and night, providing real-time data to help you make informed decisions about your health. Unlike traditional fingerstick tests, CGMs continuously track glucose levels, offering insights into trends and fluctuations. The Dexcom G7 and FreeStyle Libre 3 System contain the cutting edge of CGM technology, delivering greater accuracy and user convenience than ever before.
Comparing the Dexcom G7 and FreeStyle Libre 3 System
While both CGMs excel in performance, they have distinct differences that cater to different patient needs. Below, we break down the key features of each system to help you decide which might be the better choice for you.
Approved Diabetes Types
Both the Dexcom G7 and the FreeStyle Libre 3 System are approved for managing Type 1 and Type 2 diabetes and gestational diabetes during pregnancy. They are designed to accommodate a wide range of diabetes management needs, making them versatile options for people with different types of diabetes.
Accuracy
Accuracy is critical in CGM systems, and both devices deliver industry-leading performance. The Dexcom G7 boasts a MARD (Mean Absolute Relative Difference) of 8.2% for adults and 8.1% for pediatrics. Meanwhile, the FreeStyle Libre 3 System edges ahead slightly with a MARD of 7.9% for adults and 9.4% for pediatrics. Lower MARD values indicate higher accuracy, making both systems reliable options for glucose monitoring.
Sensor Lifespan
The Dexcom G7 has a 10-day sensor lifespan, with an additional 12-hour grace period that allows patients to replace their sensors at their convenience. On the other hand, the FreeStyle Libre 3 System offers a 14-day sensor lifespan but does not include a grace period. Depending on how often you’re comfortable changing sensors, this difference could influence your choice.
Warm-Up Time
For those seeking minimal downtime, the Dexcom G7 offers a faster warm-up time of 30 minutes compared to the FreeStyle Libre 3 System’s 60 minutes. This can be a significant factor for users who need quick access to their glucose data.
Data Transmission and Reader Options
The Dexcom G7 transmits data every five minutes, allowing users to view readings on their smartphone and/or a dedicated receiver. The FreeStyle Libre 3 System sends updates every minute and offers either smartphone compatibility or a dedicated reader. If you value continuous real-time updates, the FreeStyle Libre 3 System might be more for you. However, both can be conveniently accessed from your phone.
Integration and Compatibility
Cost and Insurance Coverage
Pricing and insurance coverage are major decisive factors:
- Dexcom G7: Starts at $89 per month through the Dexcom Simple Start program and is covered by Medicare and many insurance plans.
- FreeStyle Libre 3 System: Costs less than $40 for most commercially insured users and is covered by Medicare.
Navigating insurance coverage for CGMs can be challenging, but Aeroflow Diabetes simplifies the process. We work directly with your insurance provider to help you get the CGM that fits your needs at the lowest possible cost. Fill out our Eligibility Form to see how Aeroflow Diabetes can help you get started.
Waterproofing and Age Range
Both devices are designed for 24/7 use, including while in and around water. The Dexcom G7 is waterproof for up to 24 hours at a depth of 8 feet, while the FreeStyle Libre 3 System can withstand 30 minutes at a depth of 30 feet. Regarding age range, the Dexcom G7 is approved for users as young as 2 years old, whereas the FreeStyle Libre 3 System is approved for ages 4 and up.
Check your coverage for continuous glucose monitoring supplies through your insurance now!
Check your coverage for continuous glucose monitoring supplies through your insurance now!
CGM Comparison At-a-Glance
| Feature | Dexcom G7 | FreeStyle Libre 3 |
|---|---|---|
| Accuracy (MARD) | 8.2% for adults, 8.1% for pediatrics | 7.9% for adults, 9.4% for pediatrics |
| Sensor Lifespan | 10 days + 12-hour grace period | 14 days |
| Warm-Up Time | 30 minutes | 60 minutes |
| Reader Options | Smartphone and dedicated receiver | Smartphone or dedicated reader |
| Data Transmission | Every 5 minutes | Every minute |
| Integration | Compatible with Tandem and Insulet systems | FDA-approved for automated insulin delivery |
| Cost | Starting at $89/month with Dexcom Simple Start | Less than $40 for most commercially insured users |
| Insurance Coverage | Covered by Medicare, Medicaid and most commercial carriers | Covered by Medicare, Medicaid and most commercial carriers |
| Waterproof Rating | 24 hours at 8 feet | 30 minutes at 30 feet |
| Approved Ages | 2 years and older | 4 years and older |
Which CGM Is Right for You?
Ultimately, the best CGM for you depends on your individual needs and preferences. Both devices will provide reliable and accurate glucose monitoring, helping you manage your diabetes with confidence. If you prioritize shorter warm-up times and integration with a reader, the Dexcom G7 might be your ideal choice. On the other hand, if longer sensor life and real-time updates are more important, the FreeStyle Libre 3 System could be the better fit.
Choose the Right CGM With Aeroflow Diabetes
Whether you’re upgrading your CGM or trying one for the first time, Aeroflow Diabetes can help you get started. Our team makes it easy to access the latest CGMs, including the Dexcom G7 and FreeStyle Libre 3 System, through your insurance.
We take care of the entire process. All you need to do is fill out our Eligibility Form to start. Once you’re approved for coverage and have a prescription, we’ll deliver your CGM device and supplies straight to your door every month!
Karen Case
Karen Case has a passion for working in the healthcare industry, understanding medicine, diabetes, and diseases. She holds an Associate’s degree in Medical Assisting and worked as the Head of Triage at Asheville Endocrinology for 10 years where she learned everything she could about diabetes, thyroid issues, and other endocrine issues. Karen currently works as the Continuous Glucose Monitor Specialist at Aeroflow Diabetes where she educates patients around the topics of diabetes, medications, continuous glucose monitors, pumps, insulin, and more.
About the Author
Julia Dietrich is the Marketing Coordinator at Aeroflow Diabetes. A graduate of Kean University with a Bachelor’s degree in Advertising, Julia has contributed to many marketing campaigns across different industries and understands well how important diabetes prevention, management, and education are for overall health and wellness.
Outside of her work, Julia enjoys photography, cooking, and spending time with family. Her background in marketing and dedication to patient advocacy and wellness, coincide with her commitment to educate and promote diabetes management.
Aeroflow Diabetes Disclaimer
Information provided on the Aeroflow Diabetes website is not intended as a substitute for medical advice or care from a healthcare professional. Aeroflow recommends consulting your healthcare provider if you are experiencing medical issues relating to diabetes care.
