Having previously installed the provisioning profile on your test device (if you haven’t done this step, refer to Part 3) you are now ready to use iTunes to upload your app.
Plug your device in to your computer via the USB cable and load up iTunes. One your device is synced, select the “Apps” option of the “LIBRARY” section in the left hand column of iTunes. The main content area on the right will then display all of the apps you’ve got installed in your library – this is where you can drag and drop your .ipa file.
Once you’ve placed your app in the library, select your device in the “DEVICES” section of the left hand column, in the main content area on the right, select the “Apps” tab and then go to to the “Apply” button on the bottom right. Once you click that iTunes should begin to sync and will install your app in the process.
Now is when the fun begins, with your app on your test device you can see how well it performs and get a true feel for it on a touch interface. You might find that performance is not quite what you expected which may mean it’s time to start learning about how to optimise content for mobile devices. In graphics heavy apps this might mean learning how to blit graphics as opposed to relying on vectors and complex filters/animation.