According to a Bloomberg report, the software designers at Apple are relentlessly working on some significant iOS changes to update the company's mobile operating system, so that it looks notably streamlined and improved, ahead of the company's Worldwide Developer's Conference scheduled to be held in the second week of June.

The Bloomberg report said that the changes which the Apple designers are working on for the iOS are so drastic that it is quite possible that Apple may mull the postponement of its launch of iOS 7.

The iOS improvement effort - which is being overseen by Jonathan Ive, who is in charge of product design at Apple - being reportedly undertaken by Apple is apparently a consequence of the fact that there has hardly been any change in the iOS' appearance ever since the 2007 introduction of the first iPhone.

Moreover, with Apple facing cut-throat competition from Android smartphone makers, industry watchers have been hinting that it is about time the company updates the looks of its iOS, especially in the wake of increasing complaints about the design of the Apple's home screen.

Since Apple' top product visionary, 46-year-old Jonathan Ive is now at the helm of the company's overall "human interface" design, and is dictating the look for the company's hardware as well as software, there are speculations galore that Apple's handsets may reflect some of Ive's more minimalist sensibilities.