Along with iOS 9 Beta 4 and OS X El Capitan Developer Preview 4, Apple has also released the fourth beta of watchOS 2, more than a month after WWDC 2015 keynote.
It is the build 13S5305d, to remember requires go hand in hand with IOS 9 and can be updated via over-the-air on your iPhone through Apple Watch app, going to General> Software Update. This will load the new beta on the clock.
watchOS 2 is the second version of the operating system for Apple wearables, and is the version that covers almost all the shortcomings that brought the first version of watchOS with Apple Watch now. With this new iteration, the developers are the most advantages obtained, because you can take advantage of numerous native Apple functions hitherto restricted.
Now applications can be much more independent and less dependent iPhone, developers can access the Taptic Engine and other Apple Watch sensors such as heart rate sensor, microphone or accelerometer.
This will bring much more comprehensive applications, but the new version also brings new areas watchOS with time-lapse feature, widgets third, Time Travel feature to view events in the future, and a bedside night mode, which is activated when the clock is charging, and display the time.