Our verdict in short
Ultrahuman M1 is a continuous glucose monitor (CGM) programme that lives inside the Ultrahuman app, next to the data from Ultrahuman’s smart rings. That is its whole point: your glucose curve sits on the same timeline as HRV, sleep and recovery. If you own an Ultrahuman ring, it is the most integrated CGM option there is. If you only want glucose data, cheaper or simpler options are just as good.
Important US update: on 18 June 2026 Ultrahuman launched M2 Live in the US. It uses Abbott’s over-the-counter Lingo sensor, so you no longer need a prescription or medical consultation. Pricing starts at $99 per month on subscription, or $129 for a single sensor. Outside the US, M1 still runs on Abbott FreeStyle Libre sensors.
How does Ultrahuman M1 work?
You stick a small sensor on the back of your upper arm. A tiny filament under the skin measures glucose in the fluid between cells (not blood) for about 14 days. Your phone reads the sensor and the Ultrahuman app shows how meals, exercise, stress and sleep move your glucose. With a ring, the app also links those curves to HRV, sleep stages and recovery — for example, whether a late heavy dinner shows up as worse sleep and lower next-morning HRV.
What does the evidence say?
Abbott’s Libre-family sensors are well validated in people with diabetes (the sensor, not the M1 app or its scores, which have not been validated); the maker reports a mean absolute error of about 9% for Libre 3 against lab glucose (maker figures do not count as evidence in ONDA scores), and in an independent head-to-head study (Eichenlaub et al. 2025) Libre 3 and Dexcom G7 were similarly accurate. For people without diabetes, the evidence is weaker. Glucose in healthy people stays in a narrow range, and small rises after meals are normal. There is no strong proof yet that chasing flatter curves improves long-term health. A CGM is best used as a feedback tool for habits, not as a health verdict.
How much does Ultrahuman M1 cost?
| Option | Price (US) | Notes | |---|---|---| | Ultrahuman M2 Live (Lingo) | from $99/month; $129 single sensor | no prescription, ring optional | | Stelo (Dexcom) | $99 for 2 sensors (~30 days) | no prescription, simple app | | Lingo (Abbott app) | from $54 per 2-week sensor | same sensor, Abbott’s own app | | Levels | Core membership $399/year | CGM month + lab panels |
If you also want the ring, the Ultrahuman Ring Pro is $479 one-time. The older Ring Air is no longer sold in the US after Oura’s patent win — the CGM itself was not part of that ban.
What are the downsides of Ultrahuman M1?
Almost all the differentiation depends on also owning an Ultrahuman ring. As a standalone CGM, it is an Abbott sensor with a competent app — Abbott’s own Lingo app is cheaper per sensor, and Dexcom-based Stelo is cheaper on subscription. Coaching is mostly AI. The US Lingo version is only for adults 18+ who do not use insulin.
Who should buy Ultrahuman M1 — and who should not?
Buy it if you already own (or plan to buy) an Ultrahuman ring and want glucose, sleep and HRV in one place.
Skip it if you only want glucose data (see Lingo vs Stelo vs Ultrahuman M1), if you want a human dietitian, or if you have diabetes or use insulin — then use a medical CGM with your doctor.
Safety notes
Consumer CGMs are not diagnostic devices. They cannot diagnose or rule out diabetes or prediabetes; if your numbers worry you, ask a doctor for an HbA1c or fasting glucose test. The adhesive can irritate skin; rotate arms and stop if you see a rash or signs of infection.
For more options, see the best CGMs for biohackers in 2026 and Levels vs Ultrahuman M1.
Background reading
The metabolic biology these programmes surface — and the protocols the data unlocks.
- AI biomarker tracking — CGM as the highest-density consumer biomarker stream available
- Can you track cortisol continuously yet? — why no consumer wearable measures hormones today, unlike glucose
- The gut-brain axis as a data link — where microbiome and glucose patterns meet