Freestyle Libre 3 and Dexcom G7 are both continuous glucose monitoring options, but choosing a CGM should not be based on a simple winner list. Features, coverage, phone compatibility, alerts, wear preferences, and clinical needs all matter.
Quick summary
Product features change, so compare the current official labeling and your insurer or pharmacy coverage before choosing.
Key takeaways
- CGMs estimate glucose trends, not direct blood glucose.
- Alerts, app compatibility, sharing, warm-up, wear time, and integration options vary by product and region.
- Fingerstick confirmation may still be needed in some situations.
- The best CGM is the one a person can wear, afford, understand, and respond to safely.
What to compare
- Low and high alert options.
- Phone and receiver compatibility.
- Data sharing and report tools.
- Skin tolerance and adhesive needs.
- Insurance coverage, pharmacy access, and replacement support.
Safety over brand loyalty
If you use an insulin pump or automated insulin delivery system, compatibility is a medical safety issue, not just a convenience feature. Confirm the specific sensor and system combination before switching.
If an app or phone update changes alerts, confirm that critical notifications still work.
Practical takeaway
Compare CGMs by safety fit: alerts, compatibility, coverage, backup checks, and whether the data helps you act.
Safety note
This article is not a substitute for medical care. Seek urgent care for severe low blood sugar, confusion, fainting, vomiting with high glucose or ketones, or symptoms that feel unsafe.
What to ask your care team
- Which CGM features matter for my low-risk level?
- Will it work with my pump or phone?
- When should I confirm with a meter?
Related reading
Source summary
- Diabetes Technology: Standards of Care in Diabetes 2026, American Diabetes Association. Clinical guideline. Accessed June 5, 2026. Source
- Continuous Glucose Monitoring, National Institute of Diabetes and Digestive and Kidney Diseases. Patient guidance. Accessed June 5, 2026. Source
- Continuous Glucose Monitors, Centers for Disease Control and Prevention. Patient guidance. Accessed June 5, 2026. Source
- Check Diabetes-Related Smartphone Device Alert Settings, U.S. Food and Drug Administration. Safety communication. Accessed June 5, 2026. Source