If this is a system infrastructure, then each application uses a common system copy of the framework. If this is the environment that you downloaded and added to your project, your application uses this private copy. (The same is true for OS X applications and frameworks).
(Note that non-systemic iOS frameworks must be static, so in any case they will not be shared between applications. But this answer will be preserved even if dynamic library frameworks were created, as is the case with OS X).