Six CGM devices are available in the US in 2026. Two are OTC, four require a prescription. The best device depends entirely on your diagnosis, insurance status, and monitoring goals. This guide covers the top pick for every situation.
Medical Disclaimer: This content is for informational purposes only. Always consult your healthcare provider before making health decisions.
Best overall: FreeStyle Libre 3 (prescription) · Best OTC: Abbott Lingo · Best for AID: Dexcom G7 · Best value OTC: Abbott Lingo ($49/month) · Longest sensor life: Dexcom Stelo (15 days)
| Device | MARD | Sensor life | Monthly cost | Rx required | Best for |
|---|---|---|---|---|---|
| Abbott Lingo | 7.8% | 14 days | ~$49 | No | Best value OTC, non-diabetics |
| FreeStyle Libre 3 | 7.9% | 14 days | ~$130 | Yes | Best accuracy, non-AID users |
| Dexcom G7 | 8.2% | 10 days | ~$350 | Yes | AID systems, Apple Watch users |
| Dexcom Stelo | 8.7% | 15 days | ~$99 | No | Data-oriented OTC users, Clarity users |
| Medtronic Guardian 4 | 8.8% | 7 days | Varies | Yes | Medtronic AID pump users |
| Eversense E3 | 9.1% | 180 days | Varies | Yes + procedure | Users wanting 6-month implantable |
With and without insurance — for any monitoring period.
FreeStyle Libre 3 leads on published accuracy (7.9% MARD), reads every minute, lasts 14 days, and costs ~$130/month at retail — significantly less than the G7. For most users not on AID systems, it is the strongest clinical CGM available. Often covered by insurance for qualifying patients. Full Libre 3 review →
Abbott Lingo at $49/month is the most accurate OTC CGM (7.8% MARD) at the lowest price. No prescription needed, available at major retailers. The Lingo Score app is more approachable than Dexcom Stelo's data-heavy interface. Full Lingo review →
If you use or plan to use an automated insulin delivery system (Tandem Control-IQ, Omnipod 5, etc.), the Dexcom G7 is the only practical choice. It is compatible with more AID platforms than any other CGM. Direct Apple Watch display is also a notable advantage. Full G7 review →
For wellness monitoring without a prescription: Abbott Lingo ($49/month) is the best value with the best accuracy. Dexcom Stelo ($99/month) is the stronger data platform with Clarity integration and 15-day sensor life. See our full CGM for non-diabetics guide.
Dexcom Stelo has the longest sensor life of any OTC device at 15 days. Eversense E3 is the only implantable CGM available in the US, lasting 180 days — but requires a minor clinical procedure for insertion and removal.
Every device side by side — 30, 90, or 365 days.
Full specifications, accuracy, and pricing for every CGM in 2026.
Compare all CGM devices →