NPD's Mobile Phone Track report showed that of 121 million smartphones sold last year in the U.S., the iPhone accounted for 45 percent, making Apple the largest smartphone maker in America. Overall, smartphone sales were up 21 percent year-over-year.
Apple's market share was up slightly from 2012 (44 percent). It's big rival, and the top cell phone company in the world, Samsung, also saw its market share rise slightly, from 24 percent in 2012 to 26 percent in 2013. In third place was LG, with eight percent, and HTC with six percent. Motorola rounded out the top five with four percent.
Samsung performed better than Apple among lower income users, mirroring a similar case globally. While the iPhone was more popular among customers who earned over $100,000 annually (33 percent market share vs. Samsung's 18 market percent), Samsung devices proved more popular among those who earned $60,000 or less.
However, among those who earned less than $30,000 in 2013, iPhone sales grew nearly 2/3, by 64 percent. That market segment, though, accounted for just 20 percent of total iPhone sales last year.
Stephen Baker, vice president of industry analysis at NPD noted that, in general, 2013 was a year of smartphone market stability in the U.S. Despite this, though, Apple and Samsung continued to distance themselves from the rest of the industry. Baker added:
Overall industry growth was similar to that of 2012, and while the major hardware brands saw their shares increase marginally, the space between Apple and Samsung and the rest of the industry expanded once again.
Apple does not break down its sales between models, so its unclear which of those sales are the iPhone 5c, 5s, or 4s.