I had a look through the AR15 site, good feedback from the users, and good product support.
Most of the pics are longer range, but I've seen some close ups at this link-
https://www.flickr.com/groups/therm-app-users/pool/with/15463575839/lightbox/Longer range is more popular with others, but I know in this forum, decent pics of PCBs are more important so after a bit of checking, I finally found some examples. You can see a USB stick as the second to last pic, with some mm graduations edited onto a ruler pic to show the scale.
Prices are good, I'd consider one but I'm unsure of what the extra customs charges would be on top for the UK. Any UK member with one?
There appears to be something very similar on German ebay, Therm-app pictures, but it that device is unbranded and also double the direct price.
I know there would be some taxes, but not that amount!
So far, there isn't any European distributor as far as I can tell, but there is a US distributor being set up.