In-App Purchase Label
The In-App Purchase Label functions to alert visitors if there is a possibility they will have to spend extra money within an app.
In the iOS 11 App Store, the In-App Purchase Label can be found directly below the price/Get button in any page in the App Store. A more detailed list of In-App Purchases can be found in the Information Section.
In the Google Play Store, the In-App Purchase Label is located directly under the Install button but only on the Product Page.