I went deep diving last night into thermal imaging cameras for finding leaks in my house before winter hits proper.
A handheld camera would be best and I almost pulled the trigger on a Flir TG267 from Oritech at $750 before I came to my senses.
Flir also make a phone adaptor version but it has its own battery which must be charged before use, and there have been reported issues with these batteries failing.
Enter the Seek Thermal Compact.
This has better resolution than the Flir camera, but doesn't mix the thermal image with a visible light image as the Flir does. It also uses the phone's battery which for me is a plus as you don't have to charge it for only an hour of use (Flir) each time.
The XR version's RRP is slightly higher than the base model but the only difference is narrower field of view which equates to longer range apparently. Probably not what I really want but it's cheaper than the original on Amazon at the moment (there are different versions for iOs, Android USB-C and MicroUSB).
Also great that it's local stock so I'm getting mine tomorrow night after ordering last night.
Definitely not the cheapest it's been on Amazon but best I could find for a reasonably good thermal camera that wouldn't break the bank.
FLIR is awesome and all. But if you just want to find heating leaks, you can get by with a $20 infrared thermometer.
Sort of like a camera, but one pixel you move around :-)