Microsoft is now testing Windows 10 v1809 build 17735 internally. The new Windows 10 October 2018 Update (Redstone 5) build 17735 (10.0.17735.1000 rs5_release.180807-1451) was compiled on August 7, 2018.
Previously, Windows 10 Redstone 5 build 17730 was released for Fast and Skip ahead Insiders. The build includes various improvements and changes to the OS. Your Phone app is now available for Insiders with an Android device. In addition, an issue resulting in certain apps, like the Twitter app, not rendering content when navigating after a while is now addressed.
Windows 10 April 2018 Update is also now available for end users. The latest major update comes with new features like Timeline, Focus Assist and more. Apart from this, it includes various changes and improvements.