Can you show on the invoices from which App the subscription has been purchased through?

There is only one subscription product. Subscribers create a subscription account independent from a specific device and then connect their devices as needed. This is to avoid that subscribers are “double-charged” for the same subscription if they want to watch the content on multiple devices.

All subscriber & payment processing systems follow this procedure. It is a worldwide standard among video rental services and publishers across all platforms and the only form of subscription service users trust as they are used to it from Netflix, Hulu, Flixster, Pandora, Amazon and all other subscription-based video platforms.