iCloud Photo Sharing
To subscribe to a shared photo stream on your iPhone, iPad, iPod touch, or Mac, open your invitation in the Mail app, and click the Subscribe button in the message.
View this Photo Stream on the Web
To subscribe you need to be signed in to iCloud on:
an iPhone, iPad, or iPod touch with iOS 6 or later, or
a Mac with OS X 10.8.2 or later and iPhoto 9.4 or Aperture 3.4 or later
Getting photo stream details…