Q: can one apple id work for apple applications

Hello lampost5,

Thanks for using Apple Support Communities.

For more information on this, take a look at:

Using your Apple ID for Apple services

http://support.apple.com/kb/HT4895

Using the same Apple ID for Store purchases and iCloud (recommended)

Using the same Apple ID for Store purchases and iCloud is recommended for most users. To use the same Apple ID, follow these steps:

iPhone, iPad, or iPod touch:

1. When you first set up your device running iOS 5 or later, enter the Apple ID you use for iTunes in the setup screens. It will be used for Store purchases and iCloud.

Best of luck,

Mario