An honest health-tracker comparison
Before you buy Luna Ring 2.0
A smart ring and a light-powered wristband solve all-day tracking in different places. Compare comfort, charging, software cost and the health signals each one prioritizes.
The short answer
Choose Luna Ring 2.0 if you prefer Luna's ring design and subscription-free insights. Choose Ray if your priority is a quiet, screen-free tracker that avoids both a charging ritual and a required subscription.
The useful differences
Side by side.
Specs are manufacturer claims and US pricing snapshots, not lab-test results. A blank promise is less useful than a clear tradeoff, so we keep this list deliberately practical.
| What changes | Chargerless Ray | Luna Ring 2.0 |
|---|---|---|
| Format | Screen-free wristband | Smart ring |
| Power | Light powered; no charging routine | Rechargeable; up to 5 days, case up to 30 days |
| Screen | None | None |
| US price | $199 silver / $229 gold | $300 |
| Required subscription | None | None |
| Core tracking | Sleep, heart rate, HRV, temperature, steps and light exposure | Sleep, readiness, activity, HR, HRV, temperature and SpO₂ |
Choose by priority
Neither wins every category.
The best tracker is the one whose compromises fit your life—and that you will actually keep wearing.
Ray's case
No cable. No screen. No subscription.
Ray runs from light and uses familiar, swappable watch bands.
Luna Ring 2.0's case
Pick it for what Ray leaves out.
Luna is a compact ring and includes SpO₂ tracking.
Research note. Competitor facts were checked against Luna Ring 2.0 product page on August 20, 2026. Prices, promotions, regional features and announced-product timelines can change. Ray details reflect the current Chargerless product page. Neither product is a substitute for medical care.
Wear your health. Not a charger.
Ray tracks the essentials in a 7-gram bracelet powered by light. Silver starts at $199. Gold starts at $229. No required subscription.
See Ray optionsBrowse all 18 comparisons