How do I find out uninstall numbers for my app ?
How to track iOS app uninstalls
in the analytics section in ITC. Its not very detailed though
Do you have the exact destination? I can't find the uninstalls in the analytics section.
I don't believe there is a metric for 'uninstalls' - the closest may be 'retention'. See http://help.apple.com/itc/appanalytics/en.lproj/static.html#itc3519b4793
Devs used to be able to track inactive device tokens via APNs Feedback Service, flagging them as uninstalled, but I think that feature went away last year.