Stelo vs Lingo vs Levels: Which CGM?

Stelo vs Lingo vs Levels is really a comparison of two things: two over-the-counter glucose sensors (Stelo and Lingo) against an app-based program (Levels). Stelo is the simplest and cheapest way to see your glucose, Lingo adds more wellness coaching, and Levels wraps a sensor in a deeper analytics app for people who want to optimize. None of the three needs a prescription, all are aimed at non-diabetics who want metabolic insight, and the right pick comes down to how much guidance you want and what you are willing to spend. Here is Stelo vs Lingo vs Levels, side by side.

Stelo vs Lingo vs Levels at a glance

	Stelo	Lingo	Levels
What it is	OTC sensor	OTC sensor	App program (sensor included)
Maker	Dexcom	Abbott	Levels (software)
Prescription	No	No	No
App depth	Simple	Coaching nudges	Rich analytics, food scores
Cost model	Per sensor	Per sensor / plan	Subscription
Best for	Cheap, self-directed tracking	Habit and wellness coaching	Deep, data-driven optimizing

Stelo vs Lingo: the two OTC sensors

Stelo and Lingo are the closest match-up, since both are over-the-counter sensors you buy and wear with no doctor involved. Stelo comes from Dexcom, the company behind some of the most trusted medical CGMs, and its app keeps things simple: see your glucose, your trends, and your spikes without much fuss. That simplicity, plus a typically lower cost, makes it the easiest entry point. Lingo comes from Abbott, the maker of the FreeStyle Libre, and leans more toward lifestyle coaching, with an app that nudges you toward better habits and frames glucose around wellness rather than raw data. If you just want to see your numbers cheaply, Stelo tends to win; if you want the device to coach you a little, Lingo has the edge. Both fit the general approach in our guide to the best CGM for non-diabetics.

Where Levels fits

Levels is a different kind of product. Rather than just a sensor, it is a software program that includes a sensor and layers on a much richer app: food logging, metabolic scores for individual meals, and deeper analytics that turn your glucose curve into specific feedback. That depth is the draw for people who want to genuinely optimize, not just observe. The trade-off is cost and commitment, since Levels runs on a subscription rather than a one-off sensor purchase. If you are the type who wants to A/B test meals, track scores over time, and dig into the why, Levels offers the most. If you mainly want to learn your patterns and move on, it can be more than you need.

Cost compared

Cost is often the deciding factor. Stelo is usually the cheapest, a straightforward per-sensor price with no subscription. Lingo sits in a similar range, sometimes sold as a plan that bundles several sensors. Levels is the most expensive of the three because you are paying for the software, coaching layer, and ongoing analytics on top of the sensor, billed as a subscription. The honest framing: if budget is tight and you want a few weeks of learning, an OTC sensor is the value choice; if you want an ongoing, guided program and the price is worth it to you, Levels delivers more.

App and insights compared

The hardware in all three reads glucose similarly; the real difference is what the app does with that data. Stelo gives you a clean view of your glucose and trends, which is enough to spot your big spikes and learn from them. Lingo adds gentle coaching and a more goal-oriented feel. Levels goes furthest, scoring meals, surfacing patterns, and giving structured feedback that is closer to having an analyst in your pocket. More depth is not automatically better, since the insights only help if you act on them, but for someone who loves data, Levels turns the raw curve into the most actionable picture.

Accuracy and what to realistically expect

All three read glucose accurately enough to learn your patterns, but it helps to know how a CGM works. The sensor measures glucose in the fluid just under your skin, not directly in your blood, so there is a small lag, usually a few minutes, especially when levels are changing fast. That means you should read the trend, not obsess over a single number, and not panic over one high reading after a meal, since occasional spikes are normal even in healthy people. The useful comparison is your own data over time: are your spikes getting smaller, is your line getting steadier. Treated that way, Stelo, Lingo, and Levels all do the core job well; the differences are in the app and price, not in whether the hardware can teach you something.

Getting the most from whichever you pick

The device matters less than how you use it. Whatever you choose, start by eating your normal meals for a few days to learn your real baseline before changing anything. Then run small experiments: the same meal with and without a protein source, or with a short walk after, and watch how the curve responds. Pay attention to food order, since eating protein and vegetables before carbs often blunts a spike, and notice how poor sleep or a stressful day raises your numbers on their own. The goal is to walk away with two or three lessons you keep after the sensor comes off, rather than tracking forever. Used this way, even the cheapest option here can change how you eat for good.

Which should you choose?

• Lowest cost, simple: Stelo. The cheapest way to see your glucose with no prescription.
• Wellness coaching: Lingo. A little more guidance and habit nudging.
• Deepest insights: Levels. Rich analytics and meal scores for serious optimizers, at a subscription price.
• A short experiment: an OTC sensor (Stelo or Lingo) is usually the smart pick, since you can learn your patterns in a few weeks without an ongoing commitment.

Sensor wear and switching

One practical difference worth checking is how long each sensor lasts and how easy it is to stop. The OTC sensors are worn for roughly two weeks each, then replaced, so with Stelo or Lingo your cost is simply how many sensors you buy, and you can stop any time by not buying another. Levels, as a subscription, includes sensors but ties them to an ongoing plan, so leaving means canceling the subscription rather than just not reordering. For a short experiment this favors the OTC options, since there is nothing to cancel. If you expect to track long term, the subscription model can be more convenient because the sensors arrive automatically. Either way, check the current plan terms before you commit, since pricing and wear times are updated over time.

CGM and GLP-1

If you are on a GLP-1 medication, any of the three lets you watch your glucose response improve as the drug and your habits work together, smaller spikes and a steadier line over time. A CGM also helps you build the protein-forward, spike-smoothing eating patterns that protect your results, which ties into GLP-1 use for weight loss versus diabetes and the broader picture in insulin resistance explained and energy balance and weight regulation.