Apple devices last an average of 4 years, 3 months: Analyst
The lifespan of an Apple device is 4 years and 3 months on average, according to Asymco analyst Horace Dediu. As per his blog, Apple sold 2.05 billion devices by 2017 end, of which 750 million were retired. He then calculated the duration from the time when cumulative sales first reached 750 million (Q3 2013) to end of Q4 2017.