Today Microsoft has made the universal apps for Office for Windows 10 available for download. In order to grab yourself the preview software, you need to be running Windows 10 Technical Preview build 9926 as the apps are being made available through the new Windows Store Beta.

Like the Windows 10 Technical Preview, the preview versions of Word, Excel and PowerPoint are available free of charge -- for now.

"You can use most functionality in Word preview for free. After preview, some functionality will require a qualifying Office 365 subscription".

The only reason the apps are not currently available for phones is the fact that Windows 10 has not yet been made available as a preview for such devices.