See the new Apple iPhone XS and XS Max

The smartphones boast whopping 458 pixel per inch (PPI), thanks to 2436 x 1125 resolution in the iPhone XS and 2688 x 1242 resolution in the iPhone XS Max. There will also be three versions available for the smartphone: a 64GB model, a 128GB model, and a 256GB model.

"But the next "big one" - a success and growth driver on the scale of the iPhone - has not yet been determined".

The new Xs have water resistance of 30 minutes in up to two metres of water.

That combination of price, design, and features could make it popular with Apple fans who have been holding on to ageing phones.

The iPhone XS Max, which will be available on September 21 - with orders open the week before - represents Apple's attempt to feed consumers' appetite for increasingly larger screens as they rely on smartphones to watch and record video and to take photos wherever they are.

The new £1,099 iPhone XS Max houses a 6.5-inch Super Retina OLED display, the largest ever placed on an iPhone, and is joined by the 5.8-inch iPhone XS, the same size as last year's iPhone X.

Apple isn't wasting any time trying to get some of those new, expensive iPhone sales on the books.

'The iPhone Xs Max price reflects the name.,' Twitter user @juhasaarinen wrote.

"That won't deter customers", said Angelo Zino, of CFRA Research. The last two iPhones that had a headphone jack are now discontinued. "People reacted well to the US$1000 iPhone, so here's a slightly bigger and stronger US$1100 iPhone".

According to Apple, the new chip's eight-core design allows it to complete 5 trillion operations per second, compared to 600 billion operations per second with the previous A11.

It wasn't all iPhones for Apple on Wednesday.

Apple also introduced a fourth generation of Apple Watch with a major redesign - and a series of features created to improve its performance as a medical and health device.

Like the XS and XS MAX, the XR has a new Depth Control slider feature that lets you adjust the depth-of-field in Portrait Mode photos after they're captured, going from maximum bokeh at f/1.8 to maximum depth-of-field at f/16.

Apple senior vice president of software engineering Craig Federighi said of iOS 12 at a developers conference earlier this year the new system offers "detailed information and tools" to help users and parents keep tabs on device use.

Apple also launched an updated version of it smart watch.

Apple started the event with the Apple Watch, but it was really just the opening act for the iPhone.

Fingerprint scanners have become hygiene now and are available on phones costing as low as Rs. 5,000 but while your fingerprint may now be THE password you need to unlock your phone, it was only after Apple introduced TouchID on the iPhone 5s that the world realised how cool something as basic as unlocking your phone can be and the Cupertino giant gave it a name which is now nearly synonymous with fingerprint scanner: TouchID.

Vanessa Coleman