FLIR has a new thermal imaging camera attachment for smartphones. The FLIR ONE Pro picks up where the previous version left of. It has a ruggedized design and height adjustable connector. It is compatible with USB Type-C and Lightning devices. With VividIR, you get sharp thermal images.
You can adjust the connector to attach the unit to phones in cases. ONE Pro can measure the temperature of any spot between -4°F and 248°F. Temperature differences as small as 0.1° C can be detected. You can use the device with tablets too.