April 23, 2012
You can now make your book, music and app purchases from any of your devices automatically download to the other devices you want them on regardless of when and where you make the purchases and whether you've been able to sync in the meantime. Turn automatic downloads on for books across your devices, for instance, and you can be sure the book you're reading on your iPad will be on your iPhone when you're waiting at the doctor's office, open to where you left off. Likewise the music you bought on your laptop and want to play for a friend from your iPhone or iPod touch. To turn on the automatic downloads you want on each of your iOS devices, go to the Store section of the Settings app. On your computer, select the Store tab in iTunes Preferences in the File menu.
Syncing your devices with your computer can also be streamlined so that the syncing happens automatically when you plug them in to charge while they're on the same WiFi network as your computer, even if you don't connect them to the computer itself. To turn on the feature on your devices, select iTunes Wi-Fi Sync under General in the Settings app. And the next time you sync via a wired connection, select the device in the left-hand column of iTunes and check "Sync with this (device_name) over Wi-Fi" in the options section.