The latest update to iTunes (10.5) brings a cool new feature called “iTunes in the Cloud”. This handy feature allows you to view all your iTunes app purchases and re-download them to your computer or directly to your iPhone, iPod touch, or iPad.
How to view your iTunes app history:
1. Make sure you have the latest version of iTunes.
2. Click on ‘Purchased’ from the Quick Links section on the right-hand side.
3. On the Purchased page you can navigate between all your purchased applications and books for your iPhone/iPod touch and iPad.
4. You can choose between All, and Not In My Library from the tabs located at the top-right-hand side. The ‘All’ tab displays your complete app purchase history. The ‘Not In My Library’ displays apps you’ve downloaded but do not have on that computer’s library.
5. Now you can re-download apps you’ve purchased indiviually by clicking on the iCloud icon beside each app or download them all by clicking the ‘Download All’ button at the bottom of the page.