Stelo vs Dexcom G7: Which CGM Is Better?

The Stelo vs Dexcom G7 comparison comes down to how you plan to use continuous glucose data. Both devices use similar Dexcom glucose-sensing technology, but they are designed for different purposes. Stelo is an over-the-counter glucose biosensor for people who do not use insulin, while Dexcom G7 is a prescription continuous glucose monitor (CGM) designed for diabetes management with glucose alerts and compatible insulin-delivery integrations.

The most important differences are whether you use insulin, need high or low glucose alerts, want insulin pump integration, and prefer an over-the-counter or prescription CGM.

Comparison at a Glance

Feature	Dexcom Stelo	Dexcom G7
Prescription required	No	Yes
Best for	Non-insulin users seeking glucose insights	Diabetes management
Insulin users	No	Yes
High/low glucose alerts	No traditional G7-style alerts	Yes
Urgent low alert	No	Yes
Sensor wear	Up to 15 days + 12-hour grace period	G7: 10 days + 12-hour grace; G7 15 Day: 15 days + 12-hour grace
Warm-up	About 30 minutes	G7: about 30 minutes; G7 15 Day: about 60 minutes
Glucose updates	Every 15 minutes	Every 5 minutes
Insulin pump integration	No	Yes, with compatible systems
OTC availability	Yes	No
App focus	Glucose patterns and lifestyle insights	Diabetes management and alerts
Stelo cash price	$99 for two sensors; subscription options available	Varies by insurance and pharmacy
Main advantage	Easy OTC access	Alerts and treatment-focused features

What Is the Biggest Difference Between Stelo and Dexcom G7?

The biggest difference between Stelo and Dexcom G7 is that G7 is designed for active diabetes management, while Stelo is designed for people who do not use insulin and want glucose insights without traditional CGM alarms.

Dexcom G7 provides high and low glucose alerts, including an urgent low alert, and can connect with compatible insulin pumps and automated insulin-delivery systems.

Stelo instead focuses on glucose trends and how factors such as meals and physical activity affect glucose. It does not provide the same alarm system as G7 and should not be used by people taking insulin or those with problematic hypoglycemia.¹

Stelo Age Requirements and 2026 FDA Update

Stelo originally received FDA clearance in 2024 for adults age 18 and older who did not use insulin. In June 2026, the FDA expanded the indication to people age 2 and older who do not use insulin.¹

The FDA clearance expanded Stelo beyond adults, but Dexcom’s current U.S. consumer purchasing materials still describe the retail product as intended for people 18 and older who are not using insulin. Parents or caregivers considering Stelo for a child should therefore check current Dexcom availability and discuss appropriate glucose monitoring with the child’s healthcare provider.

Stelo vs Dexcom G7 Accuracy

Both systems use Dexcom glucose-sensing technology, but published accuracy figures should not be treated as a direct head-to-head comparison when they come from different studies.

Standard Dexcom G7 has a reported adult MARD of approximately 8.2%, while Dexcom G7 15 Day has an overall MARD of approximately 8.0%.² MARD stands for mean absolute relative difference; generally, a lower number indicates closer agreement with reference glucose measurements.

For most users, small differences in reported MARD are less important than the devices’ intended uses. G7 provides diabetes-management alerts and connectivity features that Stelo does not.

If a CGM reading does not match how you feel, follow the manufacturer’s instructions and consider confirming your glucose with a blood glucose meter when appropriate.

Sensor Wear and Warm-Up Time

Stelo lasts up to 15 days, followed by a 12-hour grace period, and has an approximately 30-minute warm-up.³ Dexcom reports that 77.9% of Stelo sensors in its sensor-life study lasted the full 15 days.³

Standard Dexcom G7 lasts up to 10 days plus a 12-hour grace period and has an approximately 30-minute warm-up.

Dexcom G7 15 Day lasts up to 15 days plus a 12-hour grace period and has a 60-minute warm-up. It is indicated for adults age 18 and older, while standard G7 is indicated for people age 2 and older.²

Dexcom reports that 73.9% of G7 15 Day sensors in its sensor-life study lasted the full 15 days.²

For more details about the extended-wear model, see our Dexcom G7 15 Day guide.

Glucose Alerts and Safety Features

This is one of the most important differences in the Stelo vs Dexcom G7 comparison.

Stelo provides glucose trends and pattern information but does not offer the traditional high and low glucose alarms available with G7. It should not be used by people taking insulin or those with problematic hypoglycemia.¹

Dexcom G7 provides customizable high and low glucose alerts, an Urgent Low Soon warning, an Urgent Low alarm, glucose trends and caregiver data sharing.

For someone who depends on timely warnings about potentially dangerous glucose levels, G7 has a major advantage.

Stelo App vs Dexcom G7 App

The Stelo app focuses on glucose awareness and lifestyle patterns. Features include glucose tracking, meal logging, nutrition information, personalized insights and educational content. Stelo updates glucose information every 15 minutes.

The Dexcom G7 app is designed around diabetes management. It provides glucose readings every five minutes along with customizable alerts, trend information, GMI, event logging, Dexcom Clarity integration and caregiver sharing.

Both systems can work with supported health and smartwatch features, although compatibility depends on the specific phone, watch and software version.

Insulin Pump Integration

Stelo does not integrate with insulin pumps or automated insulin-delivery systems.

Dexcom G7 works with compatible insulin-delivery systems, allowing CGM information to be incorporated into supported automated or semi-automated insulin delivery.

This makes G7 the clear choice between the two for someone who relies on a compatible insulin pump or automated insulin-delivery system.

Stelo vs Dexcom G7 Cost

Stelo has the simpler cash-price structure. Dexcom currently lists a one-month supply of two Stelo sensors for $99, while its one-month subscription costs $89. Stelo is also HSA/FSA eligible.⁴

Dexcom G7 pricing varies because it is a prescription CGM. Actual out-of-pocket cost depends on insurance coverage, pharmacy or durable-medical-equipment benefits, eligibility and available savings programs.

For someone paying entirely out of pocket, Stelo provides more predictable pricing. Someone with strong insurance coverage for G7, however, may pay considerably less than its retail cash price.

Stelo vs Dexcom G7 for Prediabetes

For many people with prediabetes who do not use insulin and do not have problematic hypoglycemia, Stelo is the more practical option.

Its over-the-counter availability makes it relatively easy to use glucose data to explore how meals, activity and other behaviors correspond with glucose patterns.

That does not mean everyone with prediabetes needs a CGM. Clinical blood tests remain important for diagnosing and monitoring prediabetes.

If you want to estimate the relationship between A1C and average glucose, use our A1C Calculator.

Stelo vs Dexcom G7 for Type 2 Diabetes

The better choice for type 2 diabetes largely depends on treatment and monitoring needs.

Stelo may be suitable for someone with type 2 diabetes who does not use insulin and mainly wants additional insight into glucose patterns.

G7 is generally more appropriate when insulin is part of treatment, glucose alerts are important, or CGM data is being used for more intensive diabetes management.

People taking medications that can increase the risk of hypoglycemia should discuss appropriate glucose monitoring with their healthcare provider.

You can also compare CGM readings with common fasting, before-meal and after-meal ranges in our blood sugar charts.

Stelo vs Dexcom G7 for Type 1 Diabetes

Dexcom G7 is the appropriate choice between these two devices for people with type 1 diabetes who use insulin.

Stelo is not intended for people using insulin and does not provide the traditional high and low glucose alarms available with G7.

G7 also supports compatible insulin pumps and automated insulin-delivery systems, making it fundamentally different from Stelo for intensive insulin management.

Stelo vs Dexcom G7: Which Should You Choose?

Choose Stelo if you:

• Do not use insulin
• Do not have problematic hypoglycemia
• Want to understand your glucose patterns
• Prefer over-the-counter access
• Want predictable direct-pay pricing
• Mainly want to see how food, exercise and other behaviors affect glucose

Choose Dexcom G7 if you:

• Use insulin
• Have type 1 diabetes
• Need high or low glucose alerts
• Experience hypoglycemia
• Want caregiver glucose sharing
• Need compatible insulin pump integration
• Want a CGM for active diabetes management

Bottom line: Stelo is the simpler OTC option for non-insulin users who primarily want glucose insights. Dexcom G7 is the stronger choice when alerts, insulin use, caregiver sharing or integration with diabetes-management technology are important.

Frequently Asked Questions About Stelo vs Dexcom G7

References

1. U.S. Food and Drug Administration. “FDA Clears First Over-the-Counter Continuous Glucose Monitor for Children.” [↩] [↩] [↩] [↩]
2. Dexcom. “How Is the Dexcom G7 15 Day System Different From the Dexcom G7 System?” [↩] [↩] [↩]
3. Dexcom Stelo. “How Long Can I Wear My Stelo Glucose Biosensor?” [↩] [↩]
4. Dexcom Stelo. “Stelo Glucose Biosensor.” [↩]