Luca Maestri
Chief Financial Officer at Apple
Thank you, Tim, and good afternoon, everyone. Revenue for the December quarter was $119.6 billion, up 2% from last year. During the December quarter a year ago, two unique factors affected our results. First, we had an additional week in the quarter. And second, we had COVID-related factory shutdowns that limited iPhone supply. We estimate that the net impact of these two factors resulted in a 2 percentage point headwind to our revenue performance this quarter.
We set all-time revenue records in Europe and rest of Asia-Pacific, and continue to see strong performance across our emerging markets with double-digit growth in the majority of the emerging markets we track.
Products revenue was $96.5 billion, flat compared to last year, driven by strength in iPhone, offset by challenging compares for iPad and Wearables, Home and Accessories and one less week of sales this year across the entire portfolio.
Thanks to our unparalleled customer loyalty and very strong levels of customer satisfaction, our total installed base of active devices set a new record across all products and all geographic segments, and is now over 2.2 billion active devices.
Services revenue set an all-time record of $23.1 billion, up 11% year-over-year. When we take into account the extra week last year, this represents a sequential acceleration of growth from the September quarter. We are very pleased with our Services performance in both developed and emerging markets with all-time revenue records in the Americas, Europe, and rest of Asia-Pacific.
Company gross margin was 45.9%, up 70 basis points sequentially, driven by leverage and favorable mix, partially offset by foreign exchange. Products gross margin was 39.4%, up 280 basis points sequentially, also driven by leverage and mix, partially offset by foreign exchange. Services gross margin was 72.8%, up 190 basis points from last quarter, due to a more favorable mix.
Operating expenses of $14.5 billion were at the midpoint of the guidance range we provided and up 1% year-over-year. Net income was $33.9 billion, up $3.9 billion from last year. Diluted EPS was $2.18, up 16% versus last year and an all-time record. And operating cash flow was very strong at $39.9 billion.
Let me now provide more detail for each of our revenue categories. iPhone revenue was $69.7 billion, up 6% year-over-year. We set all-time records in several countries and regions, including Latin America, Western Europe, the Middle East, and Korea as well as December quarter records in India and Indonesia.
Our iPhone active installed base grew to a new all-time high, and we had an all-time record number of iPhone upgraders during the quarter. Customers are loving the new iPhone 15 family, with the latest reports from 451 Research indicating customer satisfaction of 99% in the U.S. In fact, many iPhone models were among the top-selling smartphones around the world during the quarter.
According to a survey from Kantar, iPhones were four out of the top five models in the U.S. and Japan, four out of the top six models in urban China and the UK, and all top five models in Australia.
Mac generated revenue of $7.8 billion and return to growth, despite one less week of sales this year. This represents a significant acceleration from the September quarter when we faced a challenging compare due to the supply disruptions and subsequent demand recapture we experienced a year ago. Customer response to our latest iMac and MacBook Pro models powered by the M3 chips has been great. And our Mac installed base reached an all-time high with almost half of Mac buyers during the quarter being new to the product. Also, 451 Research recently reported customer satisfaction of 97% for Mac in the U.S.
IPad was $7 billion in revenue, down 25% year-over-year. iPad faced a difficult compare because during the December quarter last year, we launched the new iPad Pro and iPad 10th generation, and we had an extra week of sales. However, the iPad installed base continues to grow and is an all-time high with over half of the customers who purchased iPads during the quarter being new to the product, and customer satisfaction for iPad was recently measured at 98% in the U.S.
Wearables, Home and Accessories revenue was $12 billion, down 11% year-over-year due to a challenging launch compare and the extra week a year ago. This time last year, we had the full quarter benefit from the launches of the AirPods Pro 2nd generation, the Watch SE, and the first Watch Ultra. We continue to attract new customers to Apple Watch. Nearly two-thirds of customers purchasing an Apple Watch during the quarter were new to the product, and the latest reports from 451 Research indicate customer satisfaction of 96% in the U.S.
And in Services, we were very pleased with our double-digit growth, which was driven by the strength of our ecosystem. Our installed base is now over 2.2 billion active devices and continues to grow nicely, establishing a solid foundation for the future expansion of our Services business. And we continue to see increased customer engagement with our services. Both transacting accounts and paid accounts reached a new all-time high, with paid accounts growing double-digits year-over-year.
Also, our paid subscriptions showed strong double-digit growth. We have well over one billion paid subscriptions across the services on our platform, more than double the number that we had only four years ago.
Finally, we continue to build on the breadth and the quality of our current services. From Oscar-nominated theatrical releases with Apple TV+ to more publications or News+ like the Atlantic and exciting new games on Arcade.
Turning to Enterprise, we continue to see many business customers leverage Apple products to improve productivity and drive innovation. Target recently added the latest M3 MacBook Pro to their existing deployment of thousands of Macs, enabling employees across various departments to do their best work.
In emerging markets, Zoho, a leading technology company headquartered in India, offers its 15,000 plus global employees a choice of devices, with 80% of their workforce using iPhone for work and nearly two-thirds of them choosing Mac as their primary computer.
With the upcoming launch of Apple Vision Pro, we are seeing strong excitement in Enterprise. Leading organizations across many industries such as Walmart, Nike, Vanguard, Stryker, Bloomberg, and SAP have started leveraging and investing in Apple Vision Pro as the new platform to bring innovative spatial computing experiences to their customers and employees. From everyday productivity to collaborative product design to immersive training, we cannot wait to see the amazing things our enterprise customers will create in the months and years to come.
Let me now turn to our cash position and capital return program. We ended the quarter with $173 billion in cash and marketable securities. We decreased commercial paper by $4 billion, leaving us with total debt of $108 billion. As a result, net cash was $65 billion at the end of the quarter, and our goal of becoming net cash-neutral over time remains unchanged.
During the quarter, we returned nearly $27 billion to shareholders, including $3.8 billion in dividends and equivalents and $20.5 billion through open market repurchases of 112 million Apple shares. We also retired an additional 6 million shares in the final settlement of our 19th ASR. As usual, we will provide an update to our capital return program when we report results at the end of this quarter.
As we move ahead into the March quarter, I'd like to review our outlook, which includes the types of forward-looking information that Suhasini referred to at the beginning of the call. The color we are providing today assumes that the macroeconomic outlook doesn't worsen from what we are projecting today for the current quarter. And we expect foreign exchange to be a revenue headwind of about 2 percentage points on a year-over-year basis.
As a reminder, in the December quarter a year ago, we faced significant supply constraints on the iPhone 14 Pro and 14 Pro Max due to COVID-19 factory shutdowns. And in the March quarter a year ago, we were able to replenish channel inventory and fulfill significant pent-up demand from the constraints. We estimate that this impact added close to $5 billion to the March quarter's total revenue last year. When we remove this impact from last year's revenue, we expect both our March quarter total company revenue and iPhone revenue to be similar to a year ago.
For our Services business, we expect a similar double-digit growth rate to what we reported in the December quarter. We expect gross margin to be between 46% and 47%. We expect OpEx to be between $14.3 billion and $14.5 billion. We expect OINE to be around $50 million excluding any potential impact from the mark-to-market of minority investments and our tax rate to be around 16%.
Finally, today, our Board of Directors has declared a cash dividend of $0.24 per share of common stock payable on February 15, 2024, to shareholders of record as of February 12, 2024.
With that, let's open the call to questions.
