US
Stelo

Stelo Glucose Biosensor by Dexcom 2-Pack

  • Up to 15 days of wear per biosensor, plus 12 hours of grace
  • 2 biosensors per box, up to 30 days in total
  • Over the counter, for adults 18 and older not on insulin
  • iOS and Android app, readings sent by Bluetooth
  • Apple Health, Google Health Connect, Oura data sync
  • 36 F to 86 F storage, room temperature or fridge, no freezer
  • MR unsafe: no MRI, CT or diathermy while worn

Updated 20 days ago · Based on the Amazon listing and published specifications, not hands-on testing.

Our verdict

A clear way for adults not using insulin to watch glucose react to meals and exercise without seeing a doctor first. Some sensors end early, and every reading lives in the phone app.

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ASIN: B0DTZ616WZCategory: Blood Glucose Monitoring Meters

Overview

Daily life away from a clinic is the setting for the Stelo, an over-the-counter glucose biosensor. An applicator inserts a thin flexible wire under the skin, and the attached transmitter estimates glucose and sends readings to a phone app, held on by a patch and overpatch.

Continuous readings with a direction arrow show how a dinner or a run moves glucose across the whole day. The app layers coaching, meal logging and pattern summaries on top. On the downside, a share of sensors quit before their rated wear, and readings are not meant to drive medication changes without a doctor.

Who it's for

Wellness tracking for adults who want to connect food and activity to their glucose curve. People who take insulin, have kidney dialysis or have a history of eating disorders should not use it, per the label.

Pros and cons

Pros
  • No prescription required to buy
  • Continuous readings with a trend direction
  • Phone app on both iOS and Android
  • Waterproof, so swimming is allowed
Cons
  • Off limits for insulin or dialysis users
  • Some sensors end before the full wear
  • Must come off before an MRI or CT
  • Wear site on the body not listed

Performance notes

Readings come from a filament inserted beneath the skin; the transmitter converts that signal into a glucose estimate and passes it to the app. When numbers and symptoms disagree, the label says to consult a healthcare provider. Sensor life varies between units, so some will need replacing before the rated window ends.

Specifications

BrandStelo
Dimensions & fit
Item Dimensions L X W X H1.1 × 0.9 × 0.2 inches
Power & efficiency
Battery Cell CompositionLithium Manganese Dioxide
Battery Life30 days
Included components
Unit Count2
Number Of Packs2
Included Components2 Applicators, 2 Biosensors, 2 Overpatches
Other details
Operating Time30 days
Number Of Items1
Part NumberSTP-XN-003
Item Highlight24/7 Tracking & Personalized Insights. Made By Dexcom.
Manufacturer Contact InformationDexcom, Inc. 6340 Sequence Dr., San Diego, CA 92121
Special FeaturesApp available on iOS and Android

Frequently asked questions

Can people on insulin use the Stelo glucose biosensor?

No. The label says not to use it if you take insulin, are on dialysis, have problematic hypoglycemia or have a history of eating disorders. It also says not to adjust medication based on readings without a healthcare provider.

Does every Stelo biosensor last the full 15 days?

Not always. In the cited study 77.9% of sensors lasted the full 15 days, about 20% may not, and 10% of those may last less than 12 days. Each sensor also carries a grace window of 12 hours.

What happens if a Stelo sensor fails early?

Stelo replaces a biosensor that has an issue before its 15-day wear is up, after the problem is confirmed by its technical agent.

Can I get an MRI while wearing the Stelo CGM?

No. The device is MR unsafe, and the listing rules out MRI, CT and diathermy while it is worn.

How should spare Stelo sensors be stored?

At room temperature or in the refrigerator, between 36 F and 86 F, and never in the freezer.