APEX 4 (42mm) - White touch screen GPS Watch with Kilian Jornet Nylon Band vs BeamO 3-in-1 Health MultiScan: which is safer?

Withings BeamO 3-in-1 Health MultiScan is the clear pick. COROS APEX 4 (42mm) - White touch screen GPS Watch with Kilian Jornet Nylon Band carries a failing PFAS grade, and we never recommend buying a failing product.

Coros

APEX 4 (42mm) - White touch screen GPS Watch with Kilian Jornet Nylon Band

PFAS grade

F 40/100

Overall grade

F 18/100

Verdict

Skip

Hazard flags

⚑ 2

Material

Stainless steel case, nylon band, sapphire touch screen

Confidence

35%

LikelyPFAS in water-resistant treatments (band/seals)

PossibleStainless steel nickel leaching

Why this grade

Our pick

Withings

BeamO 3-in-1 Health MultiScan

PFAS grade

A 100/100

Overall grade

A 92/100

Verdict

Buy

Hazard flags

⚑ 2

Material

Medical-grade stainless steel, plastic housing, medical sensors

Confidence

72%

PossibleStainless steel corrosion and nickel release

PossibleBacterial growth on sensor surfaces

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 waterproof fitness trackers: see the full ranking