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Over-the-counter CGM

Nutrisense CGM Program with Stelo

1-Month Set: 2 Stelo Glucose Biosensors with applicators and overpatches, the Nutrisense app and access to 1:1 dietitian video calls, sold month to month

$249 a monthUS price, checked Oct 13, 2026

Two Stelo CGM sensors plus dietitian video calls, sold month to month

Check price at Nutrisense Full review →

Our low-commitment glucose pick

Abbott Lingo

2-week plan: 1 Lingo biosensor (up to 14 days) with full app access, no commitment and no auto-renewal

$54US price, checked Oct 13, 2026

One 14-day over-the-counter CGM sensor that doesn't auto-renew

Check price at Abbott Full review →

Over-the-counter CGM

Dexcom Stelo Glucose Biosensor

One-time purchase: 2 biosensors (up to 15 days each, about 30 days of wear) with applicators, overpatches and the Stelo app

$99US price, checked Oct 13, 2026

Over-the-counter CGM with 15-day sensors for anyone 2 or older not on insulin

Check price at Dexcom Full review →

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Criterion	Nutrisense CGM Program with Stelo	Abbott Lingo	Dexcom Stelo Glucose Biosensor
US price	$249 a monthChecked Oct 13, 2026 · Price details in the review	$54Checked Oct 13, 2026 · Price details in the review	$99Checked Oct 13, 2026 · Price details in the review
Three-year ownership estimate	$9,213 Planning total.	$4,277.58 Planning total.	$3,712.50 Planning total.
Choose if	You want a dietitian to walk you through a month of Stelo glucose data, and your insurance covers the calls.	An adult not on insulin who wants a two-week, no-prescription look at how meals and activity move their glucose, without a subscription.	Anyone not on insulin who wants about a month of continuous glucose data, without a prescription, to see how meals and exercise move their numbers.
Main trade-off	You pay $150 a month more than Dexcom charges for the sensors alone, and the plan keeps billing until you cancel.	Two weeks is a short sample, and ongoing tracking costs about $1,080 to $1,410 a year. The refund guarantee covers only a first purchase, and Abbott says 14.7% of biosensors may end before day 11.	There are no returns or exchanges, it isn't designed to alert you to problematic lows, and ongoing tracking costs about $1,000 to $1,200 a year depending on the plan.
Key specifications	Sensors: 2 Dexcom Stelo biosensors a month. Dexcom says each lasts up to 15 days plus a 12-hour buffer, so a shipment covers about 30 days Billing: $249 a month at list price. It renews at your current rate unless you cancel at least 72 hours before billing, and you can snooze it for up to 3 months Dietitian calls: Video calls billed to your insurance, starting with a 60-minute consultation. Nutrisense says your first call is always free. Without coverage, calls cost $39 for 30 minutes or $79 for an hour Insurance for calls: Commercial insurance from an accepted provider, such as Aetna, Blue Cross Blue Shield, Cigna or UnitedHealthcare. Covered calls typically range from 3 to unlimited, depending on the plan Who it's for: Adults 18 and older not on insulin or dialysis. Not for people with problematic hypoglycemia or a history of eating disorders, or anyone changing medication without a healthcare provider Low-glucose alerts: Stelo isn't designed to alert you to problematic lows, the FDA said in March 2024 and again in June 2026 Phone: Bluetooth phone that runs the Stelo by Dexcom app. Nutrisense lists iOS 16.2 or Android 12 at minimum, and Dexcom lists iOS 18.6 or Android 13	Sensor wear: Up to 14 days per biosensor, with a glucose reading every minute (1-hour warm-up, per the 2024 510(k) summary) Biosensors per plan: 1 on the 2-week plan ($54), 2 on the 4-week plan ($89), 6 every 12 weeks on the 12-week subscription ($249) Commitment: None on the 2-week and 4-week plans, which don't auto-renew. The 12-week subscription renews every 12 weeks at $249 unless you cancel at least 2 business days before renewal Alerts: None (the 510(k) summary says the app gives no glucose or system alerts) Water resistance: Up to 3 ft (1 m) of water for up to 30 minutes (IP27, per the 510(k) summary). Lingo's help center says you can bathe, shower and swim while wearing it Who it is for: US adults 18 and older who aren't on insulin (not intended to diagnose disease, including diabetes) App and phone: Full app access with every plan. Lingo's compatibility list covers iOS 15.2 to 26.5 (iPhone 11 series and newer) and Android 12 to 16 on listed devices. The sensor starts by NFC and sends data over Bluetooth Low Energy Refunds and replacements: 30-day money-back guarantee on your first Lingo purchase only. Faulty biosensors are replaced free or refunded during their 14-day wear. Ones that fall off early without a defect are replaced free up to 3 times in any 6 months	Sensor wear: Up to 15 days per biosensor, plus a 12-hour buffer after the session ends. Warmup takes 30 minutes Biosensors per order: 2 in the one-time box or monthly subscription (about 30 days), 6 in the 3-month subscription (about 90 days) Subscription cost: $89 a month or $252 every 3 months, before tax, and you can pause or cancel anytime Who it's for: Anyone 2 or older who doesn't use insulin, under the FDA's June 2026 clearance, with an adult caregiver supervising children. The buy page still says 18 and older. Not for people on dialysis, with problematic hypoglycemia or with a history of eating disorders, or for anyone changing medication without consulting a healthcare provider Low-glucose alerts: Not designed to alert you to problematic hypoglycemia, the FDA said in March 2024 and again in June 2026. The June 2026 510(k) summary says the display gives no glucose alerts Phone requirement: iOS 18.6 or Android 13 or later Dietitian calls: The page lists 1:1 video calls with a dietitian or nutrition specialist for every option. Without approved insurance coverage, it offers one 30-minute call at no cost Water resistance: Submersible to 8 ft for up to 24 hours when properly applied. Readings may not arrive until you're out of the water
Exact variant	1-Month Set: 2 Stelo Glucose Biosensors with applicators and overpatches, the Nutrisense app and access to 1:1 dietitian video calls, sold month to month	2-week plan: 1 Lingo biosensor (up to 14 days) with full app access, no commitment and no auto-renewal	One-time purchase: 2 biosensors (up to 15 days each, about 30 days of wear) with applicators, overpatches and the Stelo app
Dimensions	Dexcom lists the Stelo biosensor at 24.14 mm wide x 27.4 mm long x 4.72 mm high. Nutrisense doesn't give a size, and neither company publishes the weight.	Not stated by the manufacturer. The plan page, help-center articles and 510(k) summary we checked don't give the biosensor's size.	The biosensor measures 24.14 mm wide x 27.4 mm long x 4.72 mm high. Dexcom doesn't publish its weight.
Installation	No installation. The set ships 2 Stelo biosensors with their applicators and overpatches. Dexcom lists a 30-minute warmup. You need a Bluetooth phone that can run the Stelo by Dexcom app. Nutrisense lists iOS 16.2 or Android 12 at minimum, but Dexcom's own page asks for iOS 18.6 or Android 13. Nutrisense says members typically get their Stelo 3 to 6 days after ordering. The service is US only.	No installation. According to the FDA 510(k) summary, the biosensor goes on the back of the upper arm, with its sensor tail inserted into the tissue under the skin. Your phone starts it by NFC and receives readings over Bluetooth Low Energy. The summary also lists a 1-hour warm-up. For contact sports, Lingo's help center suggests a spot on the back of the upper arm where it's less likely to get knocked. Biosensors can't be reused. Lingo's compatibility list for app version 1.12.0 covers iOS 15.2 to 26.5 on iPhone 11-series and newer models. On Android, it covers versions 12 to 16 on listed devices. The help center asks Android users to check the compatible-device list before buying, and says Android 16 support may be limited to select devices.	No installation. Each biosensor comes inside a single-use applicator, and you apply it yourself to the back of your upper arm with the push of a button. Dexcom says to use a new insertion site for each biosensor. A patch and the included overpatch hold it in place. It pairs with the Stelo app after a 30-minute warmup. Your phone needs at least iOS 18.6 or Android 13.
Materials	Not stated by Nutrisense or Dexcom on the pages checked. The box holds 2 Stelo biosensors, applicators and overpatches.	Not stated by the manufacturer on the pages checked. The 510(k) summary describes a sensor tail inserted into the tissue under the skin. Lingo's help center says biosensors aren't reusable and can't be re-sterilized.	Dexcom doesn't list materials. It describes the sensor as a small, flexible wire that the applicator inserts under the skin. The wire connects to a transmitter worn with a patch and overpatch. The box holds the applicators, with the biosensors inside, and overpatches.
Warranty	Nutrisense doesn't state a warranty for the sensors. Its Terms of Service cover its products and devices and provide them "as is". Where the law requires a warranty, the terms limit it to 90 days from first use. Nutrisense doesn't say whether it replaces a sensor that fails or falls off early. Dexcom runs its own Stelo replacement program, but its page doesn't say whether that covers sensors bought through Nutrisense.	Lingo doesn't describe a separate limited warranty. Its Terms of Sale say a purchase must conform with its description, be of satisfactory quality and be reasonably fit for its intended purpose. They limit your exclusive remedies to fixing faults or the value of US$100. If a biosensor proves not fit for purpose during its 14-day period, you can get a free replacement or request a refund. Lingo may ask you to return it. A biosensor that falls off early without a defect is replaced free up to 3 times in any 6-month period. To qualify, phone customer service on the day it falls off and keep the sensor.	Dexcom provides the biosensor without warranty, to the extent the law allows, and disclaims implied warranties. Instead there's a replacement program. If a biosensor has an issue before its 15-day wear is up, Dexcom says it will ship a new one at no charge once a technical agent confirms the problem. There's no limit on validated replacements.
Returns	All sales are final, with no returns or exchanges, according to Nutrisense's plans page. Its refund policy says sensors can't be returned and monthly subscriptions aren't refunded once charged. To stop the next charge, cancel at least 72 hours before your billing date. There's no fee to cancel the month-to-month program after the first charge and shipment.	The 30-day money-back guarantee covers only your first Lingo purchase. Claim within 30 calendar days of delivery, through customer service or the "Return order" option in your Lingo account. The refund, including any shipping charges, goes to your original payment method within 14 business days. The terms don't say whether a used biosensor qualifies. One-time purchases like this plan can't be canceled. Apart from the guarantee, the terms describe refunds only for faulty biosensors.	All sales are final, with no returns or exchanges. According to the buy page, you can pause or cancel a subscription anytime.
Unresolved questions	Whether the 15% NS15 discount applies to renewal months How many video calls Nutrisense expects with the 1-Month Set. The plans page recommends 2 a month but doesn't tie that to this plan Whether Nutrisense or Dexcom replaces a sensor bought through Nutrisense that fails or falls off early Which phone requirement applies, since Nutrisense and Dexcom list different minimum versions Stelo's accuracy figures, such as MARD, which the FDA announcements don't give The design, size and sponsor of the study behind Dexcom's 77.9% sensor-life figure Whether any independent study has evaluated the Nutrisense program itself, since none is cited on the pages checked	The biosensor's size and weight Accuracy figures such as MARD (the 510(k) summary says its accuracy met the iCGM special controls, based on FreeStyle Libre 2 study data, but gives no figures) Whether the 2024 510(k) summary's 1-hour warm-up still applies, since the help-center articles we checked don't give a warm-up time Whether a used biosensor qualifies for the 30-day money-back guarantee Whether you need to remove the biosensor before an MRI or CT scan, which the plan page, help center and 510(k) summary don't address The design, size and sponsor of the study behind the 77.1% sensor-survival figure The terms of the extra 5% subscription saving	Stelo's accuracy figures, such as MARD: the FDA said only that it performed similarly to other iCGMs, and the June 2026 510(k) summary gives no figure either How often today's app updates readings: the June 2026 510(k) summary says every 15 minutes, but that predates the redesigned app Dexcom began rolling out in July 2026 Whether the redesigned app adds any glucose alerts: the June 2026 510(k) summary says the display gives none, but it predates the July 2026 rollout Whether Stelo's US store has caught up with the June 2026 clearance, since its buy page still says ages 18 and older Where Stelo ships and which payment methods it takes, since those FAQ answers were blank on the buy page The design, size and sponsor of the study behind the 77.9% sensor-survival figure Whether any Stelo app features cost extra beyond the sensors

These comparisons use published specifications, not head-to-head tests. Prices and terms are dated. Unknown costs are not zero. Check the exact variant before you buy.