Apple has made the watchOS 2 software update for the Apple Watch available, around a week after it had been forced to postpone the update due to a bug.
Apple said last week that "a bug in development of watchOS 2" had taken longer to fix than expected, but that it would be resolved soon.
This has clearly been solved as Apple has now begun issuing the update, which contains numerous updates including greater access to the sensors and controls for developers, such as the Taptic Engine and Digital Crown.
Apple also revealed three new third-party apps for the watch: Facebook Messenger, Go Pro and iTranslate.
Apple watchOS 2 brings more native apps to the watch, boosts the functionality of Siri, adds stronger security and provides the ability to wipe the smartwatch if it is lost or stolen.
Another headline addition is WiFi support, which allows the device to be used independently of an iPhone.
Jeff Williams, Apple’s senior vice president of Operations said: "We’re excited to expand Apple Watch’s functionality with watchOS 2 and offer even more personal choice with beautiful new styles and colors."
As well as the watchOS 2 update Apple also said that the Apple Watch now comes in gold and rose gold anodised aluminium, and new straps for the Sport version of the smartwatch wll come in brown, pink and blue.
One sport strap comes in bright red and has been produced in conjunction with the Project Red charity, to which Apple will donate a portion of its profits for AIDS research.
The company also announced a leather wraparound strap for the Apple Watch made in conjunction with fashion and luxury products brand Hermès. The Apple Watch Hermès also brings a new virtual face for the device.
Apple also showcased an Airstrip healthcare app for the Apple Watch which can show doctors a patient's important health information at a glance. The app can even monitor a baby's heartbeat in pregnant women if used with a sensor.
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