After a delay lasting several days, the update to the Apple Watch operating system Watch OS 2 is finally available for Apple Watch owners.

The new Watch OS 2 will make the Apple Watch less reliant on the iPhone, CNET reports. Users will also be able to run third-party applications at a better quality than in the first Watch OS.

Originally, Watch OS 2 was scheduled to be released last Wednesday, but a bug was discovered during the testing process and Apple prevented the update from going public.

Apple experienced a similar buggy introduction when it released iOS 8 for mobile devices last year. Bugs were found immediately when the software was released, with WiFi issues and problems with the Touch ID system. Apple tried to address the bugs with an update, but that update had even more bugs. Apple finally fixed the problems more than a week after iOS 8's original release.

Apple users are very likely to upgrade to new operating systems when they are released. Most owners of iOS devices are using the latest update. By comparison, Android users are slow to update to the latest version of Android.

There are new capabilities in Watch OS 2 that should make Apple Watch owners eager to upgrade. The apps that allow for heart-rate tracking, microphone use and video playback will now be usable without the iPhone. Prior to this update, the iPhone had to be near to use these apps. 

New features on Watch OS 2 include new watch faces, a nightstand mode and "time travel" mode which allows users to view their appointments, alarms and events.

Apps that will take advantage of the Watch OS 2 update include the patient-monitoring app AirStrip, CNN, Facebook Messenger, the Kayak travel-booking app, the iTranslate language translator app, the Strava fitness-tracking app and the GoPro app which allows GoPro owners to control their GoPro cameras through the Apple Watch.