Helio Smart Ring Health Tracker vs Google Fitbit Air Performance Loop Band: which is safer?
Amazfit Helio Smart Ring Health Tracker is the clear pick. Google Fitbit Air Performance Loop 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
Google Fitbit Air Performance Loop Band
PFAS grade
Overall grade
Verdict
Hazard flags
Material
Confidence
PossibleFormaldehyde residues from textile finishing
PossibleAzo dye contamination and skin sensitization
PossibleWater-resistant (water-repellent coating) finish chemistry (non-PFAS hazards)
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 Formaldehyde residues from textile finishing, Azo dye contamination and skin sensitization, Water-resistant (DWR) finish chemistry (non-PFAS hazards) and Microfiber shedding from synthetic blend on the Fitbit and not on the Amazfit.
- The Amazfit is Titanium alloy case, polymer band where the Fitbit is Nylon blend with water-resistant treatment, 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