Our beginner's guide to the App Store shows how to select, buy and install an app on iPhone or iPad ...

Learning how to manually install apps on your iPhone teaches you an additional way to install applications if you're unable to do so through the "Apps" store app on your iPhone.

Actually submitting apps to Apple for App Store distribution (or, on the Mac, signing them so that you can distribute them outside the App Store without setting off macOS' many unsigned app ...