Next iPhone and Mac could have new, Apple-designed font and drop old Helvetica Neue

It would mean the company dropping Helvetica Neue on both iOS and Mac OS. Though the 32-year-old Helvetica Neue is well-liked for its aesthetics, it has been criticised for being difficult to read.

But San Francisco was designed with the aim of being clear and readable on any screen type or size. It has rounded features and space between the letters that mean that they can be pushed together without bunching up, and avoids the need for overly thin lines.