Apple's free cash flow has seen significant changes over the past few years. In 2014, the company had a free cash flow of $62.19 billion, which decreased to $23.55 billion in 2016. However, by 2019, Apple's free cash flow had increased to $14.68 billion. Looking ahead, it is projected that the free cash flow will continue to rise, reaching $80.72 billion by 2023. These fluctuations may be due to various factors, such as changes in revenue, capital expenditures, and working capital.