January 9, 2012
Thanks to the free iTunes in the Cloud service, you can download your past iTunes Store purchases (music, apps, books, and TV shows) to your devices anytime, anyplace. On iPhone, iPad, and iPod touch, tap iTunes, and you'll see a Purchased button second from the right on the bottom. Tap it, and you can easily see what you've purchased. Select the Not on this Device tab at the top, and you can see what's not on your device. Tap the cloud icons for individual songs or Download All buttons for album, artists, and so forth, to download content to your device.
You can also automatically send your purchases to multiple devices. On iPhone, iPad, and iPod touch, select Store in the Settings app, and turn on Automatic Downloads for music, apps, and books to ensure that the things you buy will be on all your devices immediately.