Choosing between the Freestyle Libre 3 and the Dexcom G7 is one of the most common questions in diabetes technology today. Both are outstanding CGM systems, but they suit different needs and lifestyles. This head-to-head comparison will help you make an informed decision.
At a Glance
| Feature | Freestyle Libre 3 | Dexcom G7 |
|---|---|---|
| Sensor wear time | 14 days | 10 days + 12h grace |
| Sensor size | World’s smallest CGM | 60% smaller than G6 |
| Real-time alerts | Yes | Yes, highly customisable |
| Accuracy (MARD) | 7.9% | 8.2% |
| Insulin pump integration | Limited | Yes (AID systems) |
| Cost | Lower | Higher |
Freestyle Libre 3: Best For
The Libre 3 is the world’s smallest CGM sensor. It transmits glucose readings automatically to your smartphone every minute. It is particularly well-suited to people with Type 2 diabetes who are new to CGM technology and those prioritising discretion and lower cost.
✅ Best For: Libre 3
Type 2 diabetes; CGM beginners; anyone prioritising discretion and lower cost; people who do not use an insulin pump.
Dexcom G7: Best For
The Dexcom G7 offers more sophisticated alert customisation, a 12-hour grace period, and compatibility with multiple automated insulin delivery (AID) systems. For people with Type 1 diabetes who use an insulin pump or require highly customisable alerts, the G7 is the stronger option.
✅ Best For: Dexcom G7
Type 1 diabetes; insulin pump users; AID system integration; highly customisable alerts.
✅ Key Takeaway
Both CGMs are excellent. The Libre 3 wins on size, simplicity, and cost; the G7 wins on alert customisation and pump integration. The best choice depends on your diabetes type, treatment regimen, and personal priorities.
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