Smart Toaster Oven vs Crispi 4-in-1 Portable Glass Air Fryer Cooking System: which is safer?
These two grade almost identically. Pick on price and preference; neither has a PFAS edge.
Cosori
Smart Toaster Oven
PFAS grade
Overall grade
Verdict
Hazard flags
Material
Confidence
PossibleThermal degradation of gaskets or seals
PossibleGrease accumulation and combustion byproducts
PossibleGlass door thermal stress and breakage
Ninja
Crispi 4-in-1 Portable Glass Air Fryer Cooking System
PFAS grade
Overall grade
Verdict
Hazard flags
Material
Confidence
PossibleThermal fracture or stress in glass cooking vessel
PossiblePlastic housing off-gassing (VOCs and formaldehyde)
PossibleElectrical hazard or heating element degradation
Where these two actually differ
- We flag Thermal degradation of gaskets or seals, Grease accumulation and combustion byproducts and Glass door thermal stress and breakage on the Cosori and not on the Ninja.
- We flag Thermal fracture or stress in glass cooking vessel, Plastic housing off-gassing (VOCs and formaldehyde) and Electrical hazard or heating element degradation on the Ninja and not on the Cosori.
- The Cosori is stainless steel exterior, glass and metal interior where the Ninja is Glass cooking vessel with stainless steel and plastic components, which is most of the difference in these two grades.
- These two are level, close enough that price and fit should decide it rather than our grade.
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 air fryers: see the full ranking