Dexcom G6 Vs. G7: What’s the Difference?

The Dexcom G7 is the latest generation of Continuous Glucose Monitoring (CGM) from Dexcom, offering significant upgrades over the long-trusted G6. But with both systems still widely used, many people don't know about the differences, and wonder which one is right for them.

Aeroflow Diabetes is a leading supplier of both systems and can help you navigate that choice. Let's compare the Dexcom G6 vs. G7, breaking down the key differences in accuracy, sensor size, warm-up time, and features to help you decide on the best fit for your diabetes management.

In general, both Dexcom CGM devices are fairly alike. Each is an alternative to traditional fingersticks and checks blood sugar levels through a sensor applied to the upper arm. They are also compatible with insulin pumps (Omnipod and Tandem for the G6 and Tandem t:slim X2 for the G7). 

The G7 has three main components: a reader, an applicator, and an all-in-one sensor/transmitter. The G6 needs a separate transmitter that has to be replaced every 3 months. The most significant distinctions are found in the G7’s new features.

A major upgrade in the Dexcom G7 is its sensor design. Not only is it 60% percent smaller than the Dexcom G6—about the size of three stacked quarters—but it's also a rounder, all-in-one unit. The smaller size is more comfortable overall and supports the flexibility of wearing them in different placement areas (including the upper buttocks for children starting at age 2). There are also no limitations on use during pregnancy. 

When it comes to longevity, both sensors will last up to 10 days. However, the Dexcom G7 CGM now includes a new 12-hour grace period, giving you more flexibility when it's time to change your sensor.

Compared to its predecessor, the Dexcom G7 now has the shortest warm-up time of any CGM system on the market at 30 minutes (while the G6 sensor takes about 2 hours). 

This faster calibration time is part of the G7's improved functionality. Accuracy is measured by its MARD (mean absolute relative difference), where a lower value indicates better accuracy. The G7's MARD sits at 8.2%, an improvement from the G6's MARD of approximately 9.0%.

Aside from appearance, you’ll notice that applying these systems is a bit different. 

For the G6, the applicator is sizable. Prior to applying the Dexcom G6 sensor, you'll need to note a sensor code on the adhesive sticker, peel it off, and retain it for future reference. Additionally, the applicator features a safety tab that must also be removed. After applying the sensor, you'll need to insert the transmitter into the sensor and ensure it's paired with the app.

The G7 application is much more straightforward and is often compared to a hybrid of the Libre and the G6. You simply unscrew the lid, apply the all-in-one unit to your skin, and push the button.

The Dexcom G7 provides greater flexibility with customizable alerts compared to the G6. Users can personalize alert settings, including volume and sound preferences. Additionally, it offers high and low alerts, as well as an Urgent Low Soon alert, which is vital for making informed treatment decisions.

While both the Dexcom G6 and Dexcom G7 have their own digital health apps, the G7’s app has a completely redesigned interface for an enhanced user experience.

Additionally, the Dexcom Clarity app serves both personal and professional purposes. With the G6 and G7, you can share your glucose levels with up to 10 people (internet connectivity is required to share data, and you can only connect to one device at a time).

If you prefer using a smart device rather than the G7 receiver for real-time glucose readings, you’ll want to stay informed about compatibility. Several devices, including tablets and smartwatches, will work with both CGM systems. 

Apple users have more approved devices; Android users should verify compatibility, as many of their latest models are still undergoing testing and approval. Inversely, some older Android devices may not be compatible with the G7.

Visit Dexcom's up-to-date list to confirm if you have a compatible smart device.

The Dexcom G7 represents a significant upgrade over the G6 in terms of size, convenience, and user experience. With faster warm-up times, improved accuracy, and a redesigned app, the G7 is an enticing option.

However, the G6 remains a proven and reliable choice, particularly for those who prioritize its established integrations with insulin pump systems like Omnipod.

Ultimately, when comparing the G6 vs G7, the best choice depends on individual needs, including lifestyle, insulin pump usage, and importance placed on app features.

After reviewing the new features of the Dexcom G7, you may be wondering how to switch from Dexcom G6 to G7.

To be eligible, you must meet medical and insurance requirements. Aeroflow Diabetes handles the entire process, including getting all necessary paperwork from your healthcare provider and insurance. We make the switch from Dexcom G6 to G7 as simple as possible for eligible patients.

You will need to check your eligibility to receive your preferred CGM at low cost through your health insurance plan.

To qualify for a CGM through Medicare, you'll need to meet the following requirements:

• Have a diabetes diagnosis.

• Inject insulin at least 1 time a day.

• See a healthcare provider at least every 6 months.

• Have not received a new reader within the past five years.

Fill out our secure eligibility form today to see if you qualify for low-cost CGMs through Medicare or insurance.