Tracking Ring vs COLMI R09 Smart Ring: which is safer?

Tracking Ring is the clear pick. COLMI R09 Smart Ring carries a failing PFAS grade, and we never recommend buying a failing product.

Our pick

Amazon

Tracking Ring

PFAS grade

A 100/100

Overall grade

A 92/100

Verdict

Buy

Hazard flags

⚑ 2

Material

Stainless steel, titanium alloy, sapphire glass

Confidence

72%

PossibleNickel in stainless steel alloy

PossibleSkin irritation from prolonged contact

Why this gradeBuy

Xiaomi

COLMI R09 Smart Ring

PFAS grade

F 40/100

Overall grade

F 18/100

Verdict

Skip

Hazard flags

⚑ 4

Material

Aluminum alloy body, unspecified waterproof/water-resistant coating

Confidence

35%

PossibleCoating degradation and aluminum alloy leaching

ReportedUndisclosed waterproof coating composition

PossibleNickel or other heavy metal contact allergens in alloy

Why this grade

Both products run through the same public rubric: materials, coatings, brand disclosure, lab findings, and recalls, plus a beyond-PFAS hazard analysis. Grades are model-based estimates, not lab tests. How grades work →

More water-resistant smart rings & bands: see the full ranking