Apple’s App Store guidelines call for a 30 percent fee to be charged to any sales by a subscription service that signs up users through an iOS app and uses iAP, which is essentially every paid music streaming service. This forces music streaming services like Spotify, Rdio, Rhapsody, and Tidal — who all charge $9.99 a month for their subscription service on their own sites — to charge users who sign up through their respective iOS apps $12.99 a month to make up for the lost revenue it must pay to Apple. – Micah Singleton, The Verge

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