Apple's iPhone 5S is the firm's latest flagship smartphone, and brings a range of new features to tempt users to upgrade or move over to the iOS family. We've put the 5S up against its predecessor, the iPhone 5, to see if it's worth upgrading from the 2014 premium model to its 2013 sibling.
Users of the iPhone 5S and iPhone 5 are now able to upgrade their devices to run the latest mobile operating system from Apple, iOS 8.3. The latest software update was rolled out on 9 April.
iOS 8.3 includes a redesign of the ‘emoji' keyboard to display more images and improve navigation. Fixes include fewer WiFi dropoffs, improved performance and stability when rotating devices between portrait and landscape.
However, not all iPhone users were happy with the update. Some complained that since the iOS 8.3 update they have been unable to use touch or fingerprint access to the application store, so only an issue for the iPhone 5S.
Another notable feature with the 8.3 update is WiFi Calling on the EE network, but this will again only work on the iPhone 5S not the older iPhone 5.
The iOS 8.3 update is 223MB in size for those on the most up-to-date version of iOS, and takes around five minutes to download and a further five to 10 minutes to install.
The iPhone 5S, shown above left, houses the new dual flash
Design and build
The iPhone 5S is pretty much identical to the iPhone 5 in terms of design and build, as you can see from our video below. Both iPhones have an aluminium case and glass screen, retaining the premium look and feel for the latest model so you're not faced with downgrading to the plastic iPhone 5C. Both devices are also comfortable to hold, with the same thin and light build, measuring 124x59x7.6mm and weighing only 112g.
On the outside, both iPhones feature a power button, with a SIM card slot on the right, a ringer on/off button and volume controls on the left (the plus button can also be used to take pictures from the camera app). There's a headphone jack, microphone, Lightning charging port and speaker on the bottom of the device. On the back, you'll notice the flash has changed and is now egg shaped rather than circular. This houses the new dual flash, which Apple has added to improve image quality in poor lighting conditions.
The only other difference is the home button, which stays in the same position and retains its circular shape, but it is now edged in stainless steel with a sapphire crystal. This change is due to the new home button housing Apple's new fingerprint scanner technology, which we'll come to later.
The iPhone 5S, shown above left, has a new home button
The only other difference in design is colour choice. While the iPhone 5 was only available in black or white, the iPhone 5S is available in three colour options: with gold or silver backs and a white front, or with a grey back and a black front. The gold option will no doubt prove popular with those posers out there who like a bit of bling in their lives.
Winner: Draw (unless you're from Essex, in which case the gold option edges it for the 5S)
The iPhone 5S and iPhone 5 both feature a 4in Retina display with 1136x640 resolution at 326ppi. While the 5S doesn't offer an upgrade in terms of display, the iPhone smartphone screen is still a high quality display. The colours on webpages, games and video are bright and vibrant, while text is clean and crisp. The high-quality in-plane switching (IPS) panel is also evenly lit and the impressive viewing angles mean you can see what's on screen whether looking down from the top, up from the bottom, front or side on, or anywhere in between.
However, some 5S users or those who have upgraded their iPhone 5 to iOS 7 have complained about the new fonts, which are thinner and smaller, and the removal of boxes around menus, making text hard to read for those with visual impairments. So if you've got an iPhone 5 still running iOS 6, you might want to hold off upgrading if you're put off by the new pared-down interface.