How long did it take for apple inc to create the iPhone 6?

Apple Inc. began development of the iphone 6 shortly after the release of the iphone 5 in 2012. The design and engineering process typically spans several years, with the iphone 6 being officially announced in September 2014. This suggests a development period of approximately two years, although initial concepts may have started even earlier. The iphone 6 was released later that month, marking a significant evolution in Apple's smartphone lineup.