I have an Android 6 inch screen phone and a iPhone 5s. The latter, I have been using since its launch and refused to upgrade myself to the newer versions Apple introduced from time to time. The main reason being the apt size of the device.
There are no scientific studies as to which size is the best for a phone but I believe the size of iPhone 5 is the ideal size for any phone.
In a Wall Street Journal article, Geoffrey A. Fowler says he tested a dozen phones and consulted ergonomists, physical therapists and countless pants pockets. It turns out, there is some science to figuring out what screen size might best serve you, and three factors that matter most: What you can see, what your thumbs can reach and what you can comfortably hold.
We are now habituated to using our thumb for everything that we do on iPhone. Even the keyboard is designed to take the thumb impression than any other fingers. I have tried using this my Android 6 inch and the distance of reaching to a particular key as compared to 4 inch iPhone was almost 30% higher. This precisely means I have to use both my hands to have a functional work on my Android.
Apples versions after 5s has been bigger and that I presume, was to mainly compete with Android phones of higher sizes. But its 4.7-inch iPhone 6/6S and 5.5-inch iPhone 6 Plus/6S Plus was uncomfortable to use one handed resulting in falling off the hand. So did Apple make a mistake by compromising on ergonomics?
I am not the only person who has not upgraded the smaller sized iPhones. Apple CEO, Tim Cook admitted that 60 percent of iPhone users still haven’t upgraded to the larger screen sizes. I still think an iPhone with a 4-inch display is the perfect iPhone.