Spotify has submitted an update for its iPhone and iPad app in the App Store to simplify purchasing Premium subscriptions.The update is expected to leverage the Epic v. Apple ruling, which prohibits Apple from charging commission fees on external purchases.Spotify's move follows a landmark court ruling allowing for lower-cost payment options and better in-app purchasing on iOS devices.The ruling stems from Apple's legal battles and non-compliance, impacting the App Store's revenue and policies on in-app transactions.