Apple has changed its policy regarding permissions required to build and run apps on devices. Until now, Apple required users to pay $99/year to become a member of Apple’s Developer Program in order to run code on physical iPhone and iPads. As part of the new Developer Program, this is no longer required. Apps can be tested on devices, no purchase necessary.
However, this technically means that developers will be able to release apps outside of the App Store as long as they are open-sourced. Interested users could then open the code in Xcode, compile and run it on their own devices — avoiding the App Store completely.