Sideload apps: Follow developer instructions to add to your phone. Not common. Risky: Jailbreak an iOS device and load apps to it. This article explains how to get apps that are not in the App Store ...
Android is, for the most part, an open platform. You can use the Google Play Store to install apps and games, or you can go off the reservation and install APKs on ...
Some of these directions apply to all iPhones, but some are only relevant to specific iOS versions. These differences are pointed out below. The most common way to keep apps updated on your iPhone is ...
UPDATE: I was initially a little surprised by the vociferous reaction to this post about installing Installous, an unofficial App Store for pirated apps. The instructions are a quick Google search ...