lucy24 - 8:10 am on Aug 11, 2013 (gmt 0)
The final post (dated July 5) is priceless.
it appears to be used by a mobile app that fetches and displays images. maybe it's used by some sort of image-search app?
Yes: GOOGLE'S OWN APP to be exact. The one with the big blue g logo on your iPad. Interesting that nobody stepped in and owned up to it. I only discovered it while checking something about image search on the iPad. When I went to fine-tooth-comb my logs, there it was.
I love the way Google Groups refers back to WebmasterWorld for information-- even if the "information" is nothing more than me noting the existence of the UA!
I originally guessed that "rarely used" is only, ahem, used when the user is not signed in. But I tested and this turns out not to be the case. Apparently the app just isn't all that popular; most people use google within their mobile browser.