Is a smartphone required to use the Dexcom G7 or Dexcom G6 continuous glucose monitor in a patient without a phone?

A Smartphone is NOT Required for Dexcom G6 or G7

Both the Dexcom G6 and G7 can function without a smartphone using a dedicated receiver device that displays glucose readings continuously. This is a critical access point for patients who don't own smartphones or prefer not to use them 1.

How CGM Works Without a Phone

Receiver Options

• Dedicated receiver device: Both G6 and G7 offer standalone receivers that display real-time glucose values, trends, and alerts
• The receiver functions independently of any smartphone
• All core CGM features remain available: continuous glucose readings, trend arrows, customizable alerts for high/low glucose

What You Lose Without a Phone

• Remote monitoring (Share feature): Cannot transmit data to caregivers or family members remotely 2
• Retrospective data analysis (CLARITY): Limited ability to review patterns over time, though some receivers store historical data
• Voice assistant integration: Features like Siri integration for announcing glucose values are unavailable 3
• Integration with insulin pumps: Some automated insulin delivery systems require smartphone connectivity

Clinical Considerations

When a Receiver is Sufficient

The receiver-only approach works well for patients who:

• Are self-managing their diabetes independently
• Don't require remote monitoring by caregivers
• Can review basic trend data on the receiver screen
• Are comfortable with the receiver's interface

Special Populations

• Older adults: Studies show excellent usability of G7 even in adults ≥65 years, with simplified setup compared to G6 4
• Visually impaired patients: Without phone-based voice features, these patients lose critical accessibility tools 3

Practical Algorithm

Choose receiver-only CGM if:

1. Patient lacks smartphone OR refuses to use one
2. Patient doesn't need remote monitoring
3. Patient can independently manage diabetes with on-device alerts
4. Patient is not using automated insulin delivery systems

Consider alternative strategies if:

• Patient needs remote monitoring → explore basic phones with CGM apps or caregiver involvement
• Patient is visually impaired → smartphone with voice features may be essential 3
• Patient uses insulin pump → verify compatibility requirements

Common Pitfall

Don't assume CGM requires a smartphone—this creates an unnecessary barrier to technology that significantly improves glycemic control. The 2025 ADA guidelines emphasize that CGM choice "should be made based on the individual's circumstances, preferences, and needs" 1, and lack of a smartphone should not exclude patients from CGM access.