for iOS 9.1 software

Sharing. Follow the onscreen instructions to set up Family Sharing as the
family organizer, then invite family members to join.
Create an Apple ID for a child. Go to Settings > iCloud > Family,
scroll to the bottom of the screen, then tap Create an Apple ID for a
child.
Accept an invitation to Family Sharing. Make sure you are signed in to
iCloud, and that you can accept a Family Sharing invitation from your
iOS device (iOS 8 or later), Mac (OS X Yosemite or later), or PC
(iCloud for Windows 4.0 required). Or, if the organizer is nearby during
the setup process, he or she can simply ask you to enter the Apple ID and
password you use for iCloud.
Access shared purchases. Open iTunes Store, iBooks Store, or
App Store, tap Purchased, then choose a family member from the menu
that appears.