The iPhone 5s is rapidly approaching its first birthday, after being launched by Apple in September 2013. That means Apple is preparing to launch its next iPhone, presumably called the iPhone 6, with a 9 September special event already announced. But what will the difference between the iPhone 5s and iPhone 6 be? We investigate the rumoured new features to help give you an idea of what to expect. Bookmark: New iPhone 6 live blog
The iPhone 5s has a 4in display, which for a flagship smartphone in 2014 is actually pretty tiny. Even mini versions of flagship phones from Samsung, LG and HTC have displays bigger than 4in.
It's widely expected that the iPhone 6 will have a 4.7in display. There's also talk of a second new iPhone coming this year, this one dubbed iPhone Air with a 5.5in display.
The screen of the iPhone 6 could also be higher resolution than the iPhone 5s. The iPhone 5s has a 326ppi display, but it's possible that the iPhone 6's display could have a pixel density of up to 538ppi like the LG G3. See also: LG G3 vs iPhone 5s comparison.
iPhone 5s vs iPhone 6: Design
Not only is the iPhone 6 expected to have a bigger screen, it's also expected to have a significantly different design to the iPhone 5s.
The iPhone 5s has straight edges, but it looks like the iPhone 6's edges will be rounded, a bit like the iPad Air and iPod touch. It's also expected to be thinner than the iPhone 5s's 7.6mm.
Apple could achieve this thinner and lighter design through the use of super-durable sapphire glass for the display, combined with lightweight and strong Liquidmetal, which Apple has exclusive rights to use.
This means that, not only will the iPhone 6 be lighter and thinner than the iPhone 5s, it should also be less likely to scratch, crack or shatter.
Several allegedly leaked photographs of the iPhone 6's back seem to suggest that the iPhone 6 will have an illuminated Apple logo on the back. The iPhone 5s's Apple logo is made of metal.
It's thought that the iPhone 6's power button might be on the side of the device instead of on the top like it is in the iPhone 5s.
Above: A picture showing what's belived to be the first look at a fully assembled iPhone 6, courtesy of feldvolk.com.
iPhone 5s vs iPhone 6: Features & specs
In addition to the changes we can expect to see on the outside of the iPhone 6, you can also expect significantly improved internal specs. The iPhone 5s has a powerful A7 processor, so we're expecting an even better A8 processor in the iPhone 6.
There's an M7 co-processor in the iPhone 5s that's expected to carry across to the iPhone 6 and possibly become the M8, and both iPhones will share the Touch ID fingerprint sensor. It's rumoured that the M8 co-processor will have a barometric pressure sensor that will allow enhanced GPS for indoor/outdoor navigation as well as the ability to provide a localised real-time weather forecast, allow the iPhone 6 to measure altitude and possibly even measure the user's breathing.
We've heard rumours about a bigger and better battery in the iPhone 6, but some of that extra power could be used up by the iPhone 6's bigger display.
Other additions that we could see in the iPhone 6 include wireless charging, an NFC chip that works with the Touch ID to provide a secure mobile payments system, 802.11ac WiFi and a new 128GB option, none of which are available in the iPhone 5s.
iPhone 5s vs iPhone 6: Camera
The camera in the iPhone 6 is likely to represent a significant improvement over the iPhone 5s. The iPhone 5s has an 8Mp camera with an f/2.2 aperture, but rumour has it that Apple is planning on boosting that to a 10Mp camera with an f/1.8 aperture and an improved filter. Image stabilisation and other image editing enhancements are expected, too.
iPhone 5s vs iPhone 6: Software
Both the iPhone 5s and iPhone 6 will run iOS 8, the update to the Apple mobile operating system that's likely to become available after 9 September. It's possible that there will be some new software features that are only available for the iPhone 6, including camera app features and mobile payments apps, but we'll have to wait until 9 September to find out for sure.
The iPhone 5s is available to buy from Apple now, with a starting price of £549. The iPhone 6 is expected to become available to buy on 19 September, after being unveiled on 9 September, and will probably have a similar starting price.
We'll update this article when we find out more about the iPhone 6 release date and price, as well as the design, specs and new features you can expect from the new phone. You can find out even more about the iPhone 6 in our iPhone 6 rumour round-up.
Buying Advice We can't give our full verdict on how the iPhone 6 compares with its predecessor until it's released and we get our hands on it, but we can tell you that it's likely to be even better than the iPhone 5s, with a new design, a bigger screen, a better camera and other new features. Check back on 9 September for our full iPhone 5s vs iPhone 6 comparison review.