Seapoom Smart Ring Activity Fitness Tracker Sleep Tracker vs Oura - Ring 5 - Smart Ring - Size Before You Buy with OR5 Sizing Kit - Size 11 - Silver - (2026): which is safer?
Oura - Ring 5 - Smart Ring - Size Before You Buy with OR5 Sizing Kit - Size 11 - Silver - (2026) is the clear pick. Seapoom Smart Ring Activity Fitness Tracker Sleep Tracker carries a failing PFAS grade, and we never recommend buying a failing product.
Circular
Seapoom Smart Ring Activity Fitness Tracker Sleep Tracker
PFAS grade
Overall grade
Verdict
Hazard flags
Material
Confidence
PossibleHeavy metal leaching (nickel, lead, cadmium in coating or base alloy)
PossibleCoating degradation and unknown leachables
ReportedAllergic contact dermatitis from metal or coating materials
Our pick
Fitbit
Oura - Ring 5 - Smart Ring - Size Before You Buy with OR5 Sizing Kit - Size 11 - Silver - (2026)
PFAS grade
Overall grade
Verdict
Hazard flags
Material
Confidence
PossibleElectronic component off-gassing or thermal breakdown
ReportedBiofilm and bacterial growth on sensor surfaces
PossibleGlass or metal micro-debris from wear
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 waterproof smart rings & bands: see the full ranking