Great Brands USA via eBay offers the Seek Thermal XR Exteneded Range Thermal Imager for Apple iPhone, model no. LT-AAA, for $199.99 with free shipping. That's the lowest total price we could find by $89. It's compatible with iPhone 5 or higher and features a 20° field of view, 206x156 thermal sensor, Chalcogenide Lens, and up to 1,800-foot range.