Flir One, a thermal imaging camera attachment to your iPhone or Android smartphone, is designed to let you peer deep into impenetrable places like walls and through the pitch black darkness of night.

Takes images that show you how hot or cold the objects in the frame are. Infrared sensors can measure temperatures from below freezing to over 700 degrees Fahrenheit. Flexible: Use it with any modern ...

But Flir One's MSX technology, which meshes a regular image with a thermal image offers sharper optics than the identically priced Seek Thermal Camera that our very own Sarah Mitroff reviewed earlier ...