Circular Ring Slim vs Movano Evie Ring
Circular Ring Slim ($259) vs Movano Evie Ring ($269) — side-by-side specs, weight, pros and cons to help you pick the right smart ring.
Spec-by-spec
| Spec | Circular Ring Slim | Movano Evie Ring |
|---|
| Price | $259 | $269 |
| Weight | 4g | 3g |
| Battery | 4–5 days | 4 days |
| Sensors | PPG, ECG, Temp, SpO2 | PPG, SpO2, Temp, Accel |
| Material | Titanium | Medical-grade alloy |
| Sub | Optional (Kira AI) | None (free app) |
| WR | 5ATM | 1ATM |
| Weight | 3.8g | — |
| FDA | — | Registered |
Pros & Cons
Circular Ring Slim
- ECG detection unique in this price
- No subscription base tier
- Kira AI coaching
- Slim 2mm profile
- 5ATM waterproof
- ECG not FDA-cleared
- Smaller company = support risk
- Kira AI coaching behind paywall
Movano Evie Ring
- FDA-registered medical device
- Cycle phase + fertility tracking
- No subscription
- Women-first design philosophy
- SpO2 + HRV + temperature
- 1ATM WR (splash only)
- 4-day battery
- Smaller community than Oura/Samsung
Circular Ring Slim is the better value at $259. If weight matters most, Movano Evie Ring carries lighter at 3g. Both are part of our curated smart ring index — tap through to check current pricing.