iphone - can anyone use my application.app file to install the app in his device -

It is possible that someone else took the application.app file and ran the app on their device.

Yes, but without a valid mobile profile on the device What you are looking for is called "ad hoc" delivery. You need to create / update a distribution certificate with another person's device id, and use it for your app & amp; Details on making mobile profiles are on the Apple developer site and on some blogs.