Windows Insiders can try out new builds for PC and Mobile
Windows 10 Mobile goes to build 15237, PC to build 16257
Microsoft has released new preview builds of Windows 10 and Windows 10 Mobile for Insiders. Both new builds are available for users in the Fast Ring, bringing support for Eye Control on Windows 10 PC, and fixes and improvements on Windows 10 Mobile.
Windows 10 PC build 16257 introduces support for compatible eye trackers, allowing users to perform tasks that normally would require a mouse and keyboard. The feature is in Preview state, having some known issues for which you could read more from the source link below.
Windows 10 Mobile build 15237 doesn’t bring any new features, but has some improvements to Continuum, SD card, camera, and others.
You can update your device from the Settings → Updates & Security.
Source: Windows Blogs