To find this information please follow the steps below:

For IOS:
1. Go to Settings > [your name]
2. iTunes & App Store
3. Apple ID
4. View Apple ID - You might be asked to authenticate your Apple ID
5. Purchase History

For Android:
1. Go to pay.google.com
2. Verify on the right-hand upper corner that the account logged is the same account currently active on your Google Play. Log into the correct one it if it isn't logged
3. Find Other purchase activity
4. Select View purchases.
5. Select an order to see your receipt (Your order ID starts with GPA)