The strongest growth in Apple’s iPhone users is coming from people who earn less than the median household income, according to a study by comScore.

The report, titled “All about iPhone,” shows that iPhone adoption since June rose 48% among those earning between $25,000 and $50,000 per year and by 46% among those earning between $25,000 and $75,000. Those growth rates are three times that of those earning more than $100,000 a year.

The cost of a $200 device and at least $70 in monthly phone service seems extravagant for those with lower disposable incomes, noted Jen Wu, report author and senior analyst. But cost savings are realized if the device is used in lieu of multiple digital devices and services, turning the iPhone from a luxury item to a practical communication and entertainment tool, Wu said.