[...] Apple is battling perceptions that its latest iPhones aren't that different from previous models, at a time when overall smartphone sales are slowing around the world. Apple hasn't reported a year-over-year sales decline since 2003, when the iPod was still relatively new and the iPhone didn't exist. [...] the iPhone and other products have propelled the company's stock value from $5 billion to $579 billion, making it the most valuable public company in the world. Apple's revenue for the quarter included $6 billion from online services, apps and other software, he noted. Apple hasn't revealed sales figures for the watch, but most analysts estimate the company has sold 12 million or more, producing well over $5 billion in revenue. For now, Apple is finding it difficult to match the blockbuster sales it racked up last year, when shoppers flocked to buy the first iPhones with larger screens — similar to the 5- and 6-inch models that Samsung and other competitors were already selling.