Hama Smart Ring ONE vs Oura Ring 4

What Smart Ring ONE does better (0) and where 4 wins (2) — every spec side by side.

0 advantages≈ $110

Oura Ring · 20244

8.5Score

2 advantages≈ $220

Higher score

4.1Health tracking4.1

Why is Smart Ring ONE better than 4?

Smart Ring ONE has no measurable advantages in this pair.

Specifications

Only differences	Hama Smart Ring ONE≈ $110	Oura Ring 4≈ $2208.5
Design & durability
Weight	—	3 g
Water resistance	5 ATM	10 ATM
Water rating (maker)	5 atm	10 atm / 100 m
Battery
Battery life (smartwatch mode)	4 days	7 days
Health sensors
Optical heart rate	Yes	Yes
Blood oxygen (SpO2)	Yes	Yes
ECG	—	Yes
HRV tracking	Yes	—
Sensors	heart rate, SpO2	SpO2, accelerometer