Apple's revenue has steadily increased over the past decade, with the latest data showing a 17.74% year-on-year increase in revenue in 2021. However, the cost of goods sold (COGS) has also increased, although not as significantly as revenue. In 2021, COGS increased by 9.09% year-on-year. It is important to note that Apple's revenue comes primarily from its hardware products, such as the iPhone, iPad, Mac, and Apple Watch.