Hey there, not really an app (as in an app you'd use on your phone), but
I find myself using www.terapeak.com quite often. It gives you a lot of
data, including prices of active, sold and unsold listing of an item.
You can then look and see if there'...
I just started listing again and didn't put measurements on my first few
listings. First questions I received were for meassurements. So, yes,
put them. Anything you can do to help a buyer out will only increase
your success.