You can view your purchase history by following these steps:
On your mobile device (iPhone/iPad):
- Go to your device Settings > [your name] > iTunes & App Store
- Tap your Apple ID, then tap View Apple ID
- Select Purchase History
On your computer:
- Open iTunes on your computer
- Click "Account" and log in (or confirm the email address)
- Click "View my account..."
- Scroll down to "Purchase History" and click "See All"