This website provides free fluid properties, easily accessible using your iPhone or other mobile devices, i.e. fingertips, with an INTERNET connection. It includes properties of psychrometric (air), coolant (water and glycols), refrigerants, and capacity calculation functions. It aims to support technicians and engineers to have a quick check of refrigerant, coolant and air properties when they work in the field. for example, installing a HVAC equipment. The main driver is to accelerate transition from conventional refrigerants having high global warming potential (GWP) to new low GWP refrigerants, to support professionals using these new refrigerants in the field.