This article explains you, How to access Microsoft office app for free on Windows 10. Microsoft has bring a new version of office app recently. Well the app is totally free to download. Moreover, you can use it with your office 365, 2019, 2016 subscription or free web based office online subscription.
The app is basically a Progressive Web App for office.com which many of us not aware about. Looking at this, Microsoft has made this app to make office.com more usable and popular among users.
You can install and use this app in Windows 10 by going through this link. However, In Windows 10 too you can use this app only if you are using Windows 10 1803 or later. This is because Windows 10 get the PWA support from 1803 version.