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Published August 4, 2026. Updated September 9, 2026.
This article is for general information only and is not medical advice. Over-the-counter glucose monitors are not intended to diagnose or treat any condition, and none of the products below are approved for people who are prone to low blood sugar. Talk to a healthcare provider before using one to guide any medical decision.
Choosing an over-the-counter glucose monitor means weighing cost, FDA clearance, and support features across three very different products. Dexcom Stelo is the cheapest way in at $89–$99 a month and the most flexible on commitment. But its FDA clearance is the narrowest of the three, built for adults not on insulin. Abbott Lingo is the lowest-friction starting point at $54 for a two-week trial. It’s cleared as a general-wellness biosensor rather than a diabetes-management device. Signos is the most expensive by a wide margin. But it’s also the only one built specifically around weight management. It layers coaching and an AI app on top of the sensor itself.
Which Over-the-Counter Glucose Monitor Should You Buy?
After watching a family member live with one of these, the Dexcom Stelo is the one I’d point most adults to, because it costs the least month to month and its sensors last up to 15 days.
| Pick | Best for | Why |
|---|---|---|
| Best value: Dexcom Stelo | Anyone who wants the lowest ongoing cost | From $89/month on subscription, up to 15-day sensors |
| Best low-commitment trial: Abbott Lingo | First-timers who want to test the concept cheaply | $54 two-week starter with one biosensor, no subscription required upfront |
| Best for structured coaching: Signos | People who want an app and human guidance built around weight management | Two sensors a month plus AI coaching and dietitian chat, from $127/month on a 6-month plan |
What Does “Over-the-Counter” Mean for a Glucose Monitor?
All three products in this comparison are continuous glucose monitors (CGMs). They are small adhesive sensors worn on the upper arm. Each one tracks glucose levels throughout the day and syncs to a phone app. This category is new: since 2024, the FDA has cleared several of these for sale without a prescription. That’s a real regulatory milestone. But “over-the-counter” doesn’t mean identical clearance across brands, and the fine print differs enough to matter.
I’ve watched a family member wear one of these sensors day to day, and what decides whether it stays on the arm is the adhesive, the phone alerts, and the monthly bill, not the headline accuracy number. That’s the lens I bring to the three below.
Per its FDA clearance as reported by Pharmacy Times, Dexcom Stelo is cleared for adults 18 and older who don’t use insulin. It’s also cleared for people managing diabetes with oral medication. It’s cleared, too, for people without diabetes who want to see how food and exercise affect their blood sugar. But it’s explicitly not intended for anyone prone to hypoglycemia, since it doesn’t provide low-blood-sugar alerts. Abbott Lingo, per Abbott’s own clearance announcement, is positioned as a general-wellness biosensor rather than a diabetes-management tool. Signos, per Medical Economics, received its own FDA clearance specifically as a weight-management tool, not a diabetes device. That’s a narrower and different intended use than either competitor.
Dexcom Stelo
Stelo is priced at $99 for a one-time one-month supply, or $89/month on a recurring 1-month subscription (10% off). That drops to $84/month on a 3-month subscription, billed at $252 (15% off). Each sensor lasts up to 15 days plus a 12-hour buffer. Dexcom’s own materials note that roughly 20% of sensors may not last the full 15 days. That’s worth budgeting for when you calculate a monthly sensor count.
Stelo is Dexcom’s consumer spin-off of the same sensor technology used in its prescription G-series monitors. It’s also the only one of the three with no coaching layer or app-based program attached. It offers just the raw glucose data and trend graphs. That’s a feature for people who want data without a subscription program. It’s a gap, though, for people who want structured guidance.
Best for: people who mainly want the sensor and the raw data at the lowest ongoing cost. Dealbreaker: no low-glucose alerts and no coaching — you’re interpreting the trend lines yourself.
Abbott Lingo
Lingo’s entry point is a $54 two-week starter plan that includes one biosensor, free shipping, and a 30-day money-back guarantee. It’s the cheapest way to try a CGM in this comparison without committing to a monthly plan up front. Abbott markets Lingo as a “biowearable” aimed at helping healthy adults understand how diet and exercise affect their glucose. That’s distinct from Abbott’s separate Libre Rio product, which is cleared specifically for adults with type 2 diabetes who don’t use insulin.
Lingo is positioned as a wellness product rather than a diabetes-management device. Because of that, its FDA clearance and marketing both lean toward “know the impact of what you eat” rather than clinical monitoring. That’s closer in spirit to Signos than to Stelo, but without a coaching program attached.
Best for: testing whether continuous glucose data is useful to you before committing to a longer subscription. Dealbreaker: Abbott’s own starter page doesn’t publish ongoing subscription pricing after the two-week trial. So budget for a follow-up price check before you commit past the trial.
Signos
Signos is priced in tiers: $225/month on a 1-month plan, $150/month on a 3-month plan, and $127/month on its most popular 6-month plan. All tiers include two CGM sensors monthly, full access to Signos’s AI-driven app, in-app dietitian chat, and food and movement logging. A separate Signos+ tier at $199/month bundles in a clinician-prescribed GLP-1 medication alongside the CGM.
Signos is meaningfully more expensive than Stelo or Lingo at every tier. But it’s also the only one of the three built end-to-end around weight management. That’s different from general wellness or glucose data alone. The sensor is one input into an app that also tracks food, movement, sleep, and stress. A human dietitian is available to interpret the data.
Best for: people who want structured coaching and an app-based program built around the CGM data. It’s not just about the raw numbers. Dealbreaker: at $127–$225 a month, it costs roughly 1.5x to 2.5x what Stelo runs for the sensor alone. You’re paying for the program as much as the hardware.
Original Data: Monthly Cost of an Over-the-Counter Glucose Monitor
Headline prices across these three aren’t structured the same way. One is quoted per sensor, one per starter kit, one per coaching tier. That makes them hard to compare at a glance. Here’s what a realistic ongoing monthly cost looks like. Each pricing structure is normalized to “cost to keep wearing it.”
| Product | Entry cost | Ongoing monthly cost | What’s included beyond the sensor | FDA clearance scope |
|---|---|---|---|---|
| Dexcom Stelo | $99 one-time | $84–$89/month on subscription | App with trend graphs only | Non-insulin-using adults 18+; not for hypoglycemia-prone users |
| Abbott Lingo | $54 (2-week trial, 1 sensor) | Not published for ongoing plans | App-based wellness scoring | General wellness biowearable, adults 18+ |
| Signos | Included in monthly plan | $127–$225/month depending on term | AI coaching app, dietitian chat, food/movement/sleep tracking | Weight management specifically, adults 18+ |
The practical read: Stelo is the cheapest way to get raw sensor data over time. Lingo is the cheapest way to find out if you even want that data. Signos is priced like a coaching program, because that’s what most of the cost is paying for, not the sensor itself. All three use adhesive biosensors worn on the back of the upper arm. Each lasts up to roughly two weeks per sensor.
How We Compared These Over-the-Counter Glucose Monitors
This comparison is built from each company’s own pricing and FDA-clearance pages. It also draws on current 2026 coverage from Pharmacy Times, Abbott’s newsroom, and Medical Economics. Prices are approximate, current as of publication, and change frequently. Confirm the latest price with the retailer before buying. FDA clearance scope is described exactly as reported by each source. We have not independently verified regulatory filings beyond the cited coverage. See our editorial standards for more on how we research and compare products.
If you’re tracking weight loss without a CGM, our smart scales vs. body composition monitors comparison covers a cheaper entry point, and our Huel vs. Soylent vs. SlimFast guide looks at meal-replacement options some CGM users pair with glucose tracking. Browse more comparisons in our Weight Management category.
Frequently Asked Questions About Over-the-Counter Glucose Monitors
Do I need a prescription for any of these?
No. All three are FDA-cleared for over-the-counter sale, meaning no prescription is required to purchase them. Signos does involve a clinician, though, for its separate GLP-1 add-on tier.
Can people with diabetes use these instead of a prescription CGM?
Only with caution and medical guidance. Stelo is cleared for adults who don’t use insulin or who manage diabetes with oral medication. But none of the three are intended to replace a prescription CGM for anyone at risk of low blood sugar. That’s because they don’t include low-glucose alerts.
How long does each sensor last?
Dexcom Stelo is rated for up to 15 days per sensor, though about 20% may run shorter. Abbott and Signos both use adhesive biosensors in the same general two-week range, though exact published lifespans vary by source.
Which one is cheapest if I just want to try a CGM once?
Abbott Lingo’s $54 two-week starter kit is the lowest-cost single trial of the three. It doesn’t require committing to a recurring subscription up front.
