Here is another gadget that turns your iPhone into a thermal imaging camera. The UNI-T UTi120MS has temperature measurement range of 20 to 400C with +/-2C accuracy. It has a resolution of 120x90p. This particular model is designed for Lightning devices. It works with the Thermal Mobile app.
The UTi120MS has video recording capability. It has a 50 x 38-degree field of view and frame rate of 25Hz. There are 7 color palettes for you to choose from.