Tracking Ring vs Oura Ring 4 Ceramic Smart Ring with 8-Day Battery: which is safer?
Tracking Ring is our pick: better on PFAS and on the overall hazard picture.
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
Apple
Oura Ring 4 Ceramic Smart Ring with 8-Day Battery
PFAS grade
B 85/100
Overall grade
D 69/100
Verdict
Buy
Hazard flags
⚑ 4
Material
Ceramic coating with titanium, stainless steel band
Confidence
72%
PossibleCeramic coating composition (unconfirmed)
PossibleBacterial and fungal biofilm formation
PossibleNickel leaching from stainless steel components
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