One of the biggest issues developers have had with building App Store apps is that they can’t release betas to users. But, Apple is going to be fixing this problem by allowing developers to have closed beta programs with up to 100 users.
The beta apps will still be distributed through the App Store and developers will need to get the serial number of the beta testers iPhone and activate that iPhone as a beta testing phone.
This new functionality will be great for developers that would like to have a little bit more real world testing under their belts before they release the app to the public.