Colmi R03 vs Colmi R12

What R03 does better (2) and where R12 wins (0) — every spec side by side.

Colmi · 2024R03

4.8Score

2 advantages≈ $30

Higher score

Colmi · 2025R12

3.8Score

0 advantages≈ $35

3.8Health tracking3.8

3.3Build & durability2.3

Why is R03 better than R12?

R12 has no measurable advantages in this pair.

Specifications

Only differences	Colmi R03≈ $304.8	Colmi R12≈ $353.8
Design & durability
Weight	4.7 g	4.7 g
Water resistance	5 ATM	1 ATM
Water rating (maker)	5 atm / 50 m	1 atm / 10 m
Colours	—	Black
Battery
Battery life (smartwatch mode)	7 days	5 days
Health sensors
Optical heart rate	Yes	Yes
Blood oxygen (SpO2)	Yes	Yes
Sensors	heart rate, SpO2, accelerometer	heart rate, SpO2