Android GCM: same sender id for more application

Question

Is it possible to use same sender id for more applications? Now I have 18 application (different language and some functionality) which use same backend. Now I am implementi

Answer 1

Developers are perfectly welcome (and encouraged) to use the same sender ID / API key for all of their apps.

When you send a message, you specify a registration ID, which is implicitly linked to the package name of the app + device where it was generated. Only the app which requested the registration ID will receive your message.

Source: I'm a member of the Android team at Google.