Here is a tiny gadget that turns your iPhone into a non-contact infrared thermometer. The YLY Forehead Thermometer can display readings in Celsius and Fahrenheit. It has a OLED screen to show your results clearly. You can also use the device to measure room temperature.
The YLY iPhone Infrared Thermometer is compact enough to fit in your pocket. It can give you a reading in a second and has a fever warning feature built-in. You can find out more about it here.