Asymco analyst Horace Dediu this week shared new research that focuses on determining the average lifespan of Apple devices. Dediu's research doesn't break down data on a specific product level, but instead encompasses Apple's entire stable of products in one general lifespan average. According to Dediu's proposal, if you use the number of active devices and cumulative devices sold, you can get to the average lifespan.

Dediu's research on this topic was propelled forward when Apple CEO Tim Cook revealed the total number of active Apple devices -- 1.3 billion worldwide -- during the company's most recent earnings call. Now, the analyst proposed that to determine the average lifespan, you can subtract the known active devices number from cumulative devices sold to determine "cumulative retired devices." 

Dediu then said that to estimate the average lifespan, you calculate the time between "cumulative devices sold" at the beginning of a product's lifespan, and the current "cumulative retired devices." He ultimately determined that the average Apple device lifespan is about 4 years and three months, when looking at the data of Apple products sold in Q2 2013 and retired in Q4 2017, a time when the 2013 devices died or otherwise stopped working and their owners sought to purchase new versions.

He noted that cumulative devices sold for Apple includes Macs, iPhones, iPads, Apple Watches, and the iPod touch, although of course the lifespan average number is just that -- an average -- and doesn't perfectly apply to each individual product. Just over four years is likely in the ballpark for how long Mac users keep around their computers, but if looked at on a product-by-product basis that statistic would likely be different for iPhone and Apple Watch owners. 

Source: macrumors