Helio Ring Size Smart Fitness vs Tracking Ring: which is safer?

Tracking Ring is our pick: better on PFAS and on the overall hazard picture.

Amazfit

Helio Ring Size Smart Fitness

PFAS grade

B 85/100

Overall grade

C 73/100

Verdict

Buy

Hazard flags

⚑ 3

Material

Titanium alloy ring body, polymer band

Confidence

62%

PossiblePolymer band degradation and volatile compound off-gassing

PossibleContact dermatitis from band material or adhesives

PossibleMicroplastics from band wear or degradation

Why this gradeBuy

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

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