Apple emails a receipt for App Store purchases and also keeps a purchase history in your Apple account.

Go Guide app

In the app

  1. Open iPhone Settings, tap your name, then Media & Purchases.
  2. Choose View Account, then Purchase History.
  3. Find Go Guide and open the transaction details.
goguide.co.uk

On the web

  1. Sign into reportaproblem.apple.com or check the email address attached to your Apple ID.
  2. Search for a receipt from Apple that contains the Go Guide purchase.