Lingo vs Stelo vs Levels CGM in 2026: What Non-Diabetic Users Actually Get

This article compares consumer health-monitoring devices and how they’re commonly used. It is not medical advice. If readings consistently surprise you, that’s a conversation with a physician.

Continuous glucose monitors went OTC in the US in 2024. Stelo (Dexcom) and Lingo (Abbott) became available without a prescription, and Levels expanded access. Three years later, the market sells a lot of subscriptions to non-diabetic users curious about their glucose patterns.

This guide covers what each actually does, what you’ll spend, and the honest question of whether $80-200 a month is worth what you’ll learn.

TL;DR

Use case	Pick	Why
Lowest cost, just want raw data	Stelo	OTC, no subscription, functional app
Best app + guided coaching	Levels	Polished UX, lifestyle coaching, premium price
Strong app from Abbott’s hardware	Lingo	OTC, decent app, mid-priced
First-time user, just trying it	Stelo	Cheapest entry, easiest to stop
Most readers	Probably skip	The marginal insight rarely justifies $100/month long-term

What a CGM actually measures

A CGM uses a small filament inserted under the skin to sample interstitial glucose — the glucose concentration in the fluid between cells, which lags blood glucose by 10-15 minutes. Samples taken every 5 minutes (typical) produce a continuous trace of glucose levels through the day.

What this is good at: showing post-meal spike magnitudes, identifying foods that produce sharper spikes for you specifically, and revealing fasting glucose patterns.

What this is not: a diagnostic tool for non-diabetics. The OTC approvals are for general wellness, not condition assessment.

Lingo (Abbott)

Lingo uses a Freestyle Libre 2-derivative sensor with an Abbott-developed consumer app.

• Hardware: 14-day wear, water-resistant to standard depths
• App: clean visualization of glucose curves, food logging integration, daily “Lingo Count” gamification
• Cost (2026): typically $89-99/month for a 2-sensor pack
• Strengths: Abbott’s sensor accuracy reputation, clean app
• Weaknesses: app’s gamification can oversimplify — the “Lingo Count” abstracts the actual glucose data behind a single number

Stelo (Dexcom)

Stelo uses a Dexcom G7-derivative sensor. Dexcom is the dominant clinical CGM brand; Stelo is their consumer offering.

• Hardware: 15-day wear, similar water resistance
• App: simpler than Lingo’s. Shows the glucose trace, basic insights, food logging
• Cost (2026): ~$89/month for 2 sensors (no subscription wrapper)
• Strengths: Dexcom’s clinical accuracy reputation, no subscription
• Weaknesses: less “coaching” than Lingo or Levels — you’re more on your own to interpret

Levels

Levels uses Abbott Freestyle Libre 3 hardware (the most refined Abbott sensor) wrapped in a premium subscription experience.

• Hardware: Libre 3 — 14-day wear, smallest profile of the three
• App: most polished. Food logging is rich, AI insights, member community, lifestyle coaching content
• Cost (2026): ~$199/month subscription including sensors + app
• Strengths: best UX, structured behavior-change framing, integrated community
• Weaknesses: 2x the price of Stelo/Lingo for the same underlying clinical-grade hardware (Libre 3) — you’re paying for software wrapper + content

Cost-per-month math

Tier	Stelo	Lingo	Levels
Monthly	$89	$89-99	$199
3 months	$267	$267-297	$597
12 months	$1,068	$1,068-1,188	$2,388

A year of Levels costs $1,200+ more than a year of Stelo for what is, at the sensor level, similar Abbott hardware. The difference is what Levels does with the data in the app.

Accuracy reality

All three use established commercial CGM sensors (Abbott Libre 2/3 or Dexcom G7) at their core. Sensor-to-sensor variation within a brand is typically larger than the gap between brands.

For non-diabetic use cases, “accuracy” mostly means trend reliability rather than absolute precision. All three reliably show:

• Post-meal glucose curves (peak height, time-to-peak, recovery time)
• Fasting baseline patterns
• Day-to-day variability

What they don’t reliably show:

• Single absolute readings to ±5 mg/dL precision
• The biological “why” behind individual responses (the data shows patterns; interpretation is separate)

What you’ll actually learn in 14 days

Most non-diabetic users experience three useful insights:

1. Individual food response varies wildly. Two people eating the same meal get different glucose curves. You’ll likely find that some “healthy” foods (oats, certain fruits, white rice) spike you sharply while others people consider “indulgent” don’t.

2. Time-in-range and post-meal spike data are more actionable than fasting glucose. Most non-diabetics have normal fasting glucose. The interesting variation is in post-meal response.

3. Sleep + stress impact glucose more than most people realize. A poor night’s sleep often shows up as elevated daytime glucose, independent of food.

If you’ve already encountered these three insights in passing — from reading or from someone you trust — you may not need $100/month to confirm them.

When CGMs aren’t worth $100/month

• You already know your dietary triggers from elimination experiments
• You’re not in an active “I want to lose 15-30 lbs / optimize energy” phase
• You won’t actually change behavior based on the data
• You have no specific question the data would answer

A structured food log + occasional finger-stick blood test (a $20 home meter) covers most of the same ground for users who’d otherwise glance at the CGM and not act.

Privacy + data handling

All three store data in cloud services. Each has standard health-data privacy protections (HIPAA for US users, GDPR for EU). Subscription cancellation — what happens to historical data — varies; verify before signing up.

Wear + practical experience

• Insertion: spring-loaded applicator; nearly painless. First-time users overthink it.
• Daily wear: covered by a clear adhesive patch; visible if your shirt has tight sleeves.
• Showering, swimming, exercise: fine under typical conditions.
• Sauna: borderline — temperature limits vary by sensor.
• Sleep: barely noticeable.

The hardware experience is identical enough across the three that this isn’t a deciding factor.

What we’d watch (briefly)

• Veri, Signos, Nutrisense — alternative consumer CGM programs, often wrapping the same Abbott/Dexcom hardware with their own app and coaching. Pricing is comparable to Levels.
• Continuous biomarker monitors beyond glucose — ketones (KetoMojo), lactate (Pixie) are early-stage; not yet CGM-equivalent.

Verdict by user

• Curious, want to try once: Stelo or Lingo for 1-2 months. ~$90/month. Stop after you’ve seen your patterns.
• Committed to dietary experimentation, want coaching: Levels. The community + structured framing justify the premium for users who’ll actually engage.
• Athlete tracking metabolic context: Stelo or Lingo. Cheaper, same underlying data.
• Diabetic or pre-diabetic considering this: this is a different conversation — your physician should be in it. The OTC consumer products aren’t a substitute for prescribed CGM access in your situation.

Closing note

CGMs are interesting tools. They are also expensive subscriptions that often outlast the period they’re producing new insights. Plan for 1-3 months of use unless you specifically know why you’re committing longer. The data is real; the marginal benefit of month 4 versus month 1 typically isn’t.

For other wearable comparisons, see our smart ring roundup and the Whoop vs Garmin guide.