How to get an invoice for in-app purchase?

To get an invoice for your in-app purchase made through the Apple App Store, follow these steps: 

Using Your iPhone or iPad

1. Open the Settings app. 

2. Tap your Apple ID at the top of the screen (your name). 

3. Tap Media & Purchases. 

4. Select View Account. 

5. Under Purchase History, tap Purchase History. 

6. Find the in-app purchase you're looking for and tap on it. You will see the details of the transaction, but Apple doesn’t provide a direct invoice download from this interface. 

Using a Computer (via Apple’s website)

1. Open a web browser and visit Apple’s Report a Problem website. 

2. Sign in with your Apple ID. 

3. In the list of purchases, find the in-app purchase you want the invoice for. 

4. Click on "Invoice" or "View Receipt" next to the transaction, which will open a detailed purchase receipt that you can print or save. 

Apple Support: 

If you're unable to locate your invoice using the above steps, you can contact Apple Support for assistance. They should be able to provide you with a copy of your receipt.