I have the in-app purchases disabled in the Settings, so upgrading an app like yours requires doing an app switch, then typing in Restrictions password, enabling IAP, switching back to the app (frequently needing to restart it to), making a purchase (including typing a password), then going back to Settings and re-disabling IAP. In other words it's a hassle.
I have the in-app purchases disabled in the Settings, so upgrading an app like yours requires doing an app switch, then typing in Restrictions password, enabling IAP, switching back to the app (frequently needing to restart it to), making a purchase (including typing a password), then going back to Settings and re-disabling IAP. In other words it's a hassle.