To view all purchases made under your Apple ID, you can view your iTunes Purchase History. To do this:
1. Open iTunes on a desktop or laptop.
2. Make sure you're in the iTunes Store (select this from the menu on the left hand side).
3. Click Sign In in the top right hand side (or if it says your Apple ID already, just click on that).
4. Enter your login details and click View Account.
5. Underneath the heading Purchase History, select See All.