Helio Smart Ring Health Tracker vs Smartwatch Band: which is safer?
Amazfit Helio Smart Ring Health Tracker is the clear pick. Fitbit Smartwatch Band carries a failing PFAS grade, and we never recommend buying a failing product.
Our pick
Amazfit
Helio Smart Ring Health Tracker
PFAS grade
Overall grade
Verdict
Hazard flags
Material
Confidence
PossiblePolymer band composition and residual monomers
PossibleBacterial growth in sealed band-case junction
Fitbit
Smartwatch Band
PFAS grade
Overall grade
Verdict
Hazard flags
Material
Confidence
PossibleElastomer additive migration (plasticizers, slip agents)
PossibleDegradation and microparticle shedding
PossibleHeavy metal pigments in colored bands
Where these two actually differ
- We flag Polymer band composition and residual monomers and Bacterial growth in sealed band-case junction on the Amazfit and not on the Fitbit.
- We flag Elastomer additive migration (plasticizers, slip agents), Degradation and microparticle shedding, Heavy metal pigments in colored bands and Contact dermatitis or irritation from uncertified elastomers on the Fitbit and not on the Amazfit.
- The Amazfit is Titanium alloy case, polymer band where the Fitbit is Silicone, elastomer, or fluoropolymer elastomer (unspecified), which is most of the difference in these two grades.
- The gap is 45 points, wide enough that this is not a close call, and the Amazfit is the one to buy.
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