A lot has been said about Apple's various services like the iTunes and App Stores, Apple Pay, Apple Music, Apple Care and others now making more money than its Mac business. In the June quarter, for example, the Services category shot up 20 percent year-over-year, raking in nearly $6 billion in quarterly revenue and making Services the second largest part of Apple's revenue overall.
Services allow Apple to generate a steady stream of revenue from existing devices, leading Asymco analyst Horace Dediu to estimate in an interview with The Financial Times that, including hardware and software, existing Apple customers currently spend around $1 per day.