Apple has unveiled the iPhone 14, with emergency satellite connectivity and car crash detection technology, at a launch event in the US.

The company revealed four versions of the new handset at its Cupertino headquarters, with an audience attending in person for the first time since the pandemic.

It also showed off a new extreme sports wearable - the Watch Ultra.

The event focused on next generation iPhone, Watch and AirPod products.

Apple CEO Tim Cook was on stage at the Steve Jobs theatre inside the tech giant's California campus - but the presentation itself was entirely pre-recorded.

Apple Watch Series 8

Apple Watch Series 8 has a number of new features, including car crash detection, temperature sensors for tracking ovulation cycles and a new low-power mode option.

People have been cautious about menstrual trackers since changes were made to abortion legislation in the US and there are concerns that data about periods could be used by law enforcement. Apple says the data on its devices will be encrypted and only accessible via a passcode or biometrics.

"We are taking our commitment to women's health even further," said Jeff Williams, Chief Operating Officer at Apple.

Apple said a new automatic retrospective ovulation notification could help those who are trying to conceive.

If activated, the new watch can monitor body temperate every five seconds overnight, and detect tiny changes which can signal ovulation.

Another new feature is car crash detection. Using sensors, the watch will be able to identify a severe crash and will automatically connect its wearer with emergency services, provide their exact location and notify emergency contacts.

The Series 8 now also features a low power mode, a feature borrowed from the iPhone, that promises up to 36 hours of battery life on a full charge.

The Apple Watch Series 8 is priced from $399 in the US, £419 in the UK.

Apple Watch Ultra

Swim proof, dust proof and crack resistant - Apple has announced its rival to the likes of Garmin, Polar and other rugged watchmakers.

Ultramarathoner Scott Jurek from Born to Run appeared in the presentation for the new watch, which focused on a larger face design for extreme sports use.

All Ultra watches have up to 36 hours battery life on a single charge and an extended battery life of 60 hours, with Apple promising enough power for its customers to complete an ultra-triathlon which includes swimming, cycling and running.

The Apple Watch Ultra is priced from $799 in the US, £849 in the UK.

iPhone 14

The company is releasing the iPhone 14 in two sizes, the iPhone 14 and the iPhone 14 Plus.

The new handsets are capable of sending an emergency call for help via satellite. The phone will display the whereabouts of passing satellites overhead and demonstrate how to point the device at them correctly.

It can take from 15 seconds to a few minutes to send a basic message.

"The investment to add satellite capability should not be underestimated," said Ben Wood, chief analyst at CCS Insight.

"It will likely have taken Apple years to put all the pieces of the puzzle in place, including a commercial agreement with satellite provider Globalstar, and the creation of the infrastructure needed to pass messages to the emergency services."

Tech analyst Paolo Pescatore said he believed the innovation was good news for consumers "in hard to reach areas".

"It is encouraging to see providers starting to get serious about using satellite - ultimately reliable and robust connectivity is still highly sought after among all users," he said.

iPhone 14 camera

The tech giant announced a new 12-megapixel camera, capable of taking photos of fast-moving subjects, and the company claims a 49% improvement in low-light capturing.

The front camera also included auto-focus for the first time, to help sharpen selfies.

According to Apple, iPhone users took more than three trillion photos in the last 12 months.

The iPhone 14 is priced from $799 (US), £849 (UK).

iPhone 14 Pro

The biggest change in iPhone 14 Pro and iPhone 14 Pro Max design is the top of the screen which is now a pill shaped cut-out.

A feature called the Dynamic Island has replaced the black notch, which many iPhone users complain about - and it can change shape depending on what notifications there are.

The other big change is that the handset can always remain on.

When the phone is not in use, the screen dims and the refresh rate is lowered.

The handset comes in a deep purple colour alongside black, silver and gold.

The iPhone 14 Pro is priced at $999 (US), £1099 (UK).

AirPods

AirPods Pro are easier to find than their predecessors. Each pair comes with a new system for finding individual lost earphones, which play a chime when dropped outside of the case.

Additionally, the case itself gets its own speaker, which will play a louder sound when prompted by the Find My app.

The new AirPods Pro are priced at $249 (US), £249 (UK).