Apple has been in the free Microsoft Word alternatives game for a while. With its platform in the minority, the company committed to creating its own apps for productivity and media creation. iWork's Pages word processor is an adequate replacement for Microsoft Word on Macs.
Like Word, it also has mobile applications for the iPhone and iPad. A cloud version of the app lets you edit documents on any PC with a decent web browser installed. The different versions of Pages are linked together by iCloud, which is where Apple encourages you to save your documents for easy editing and sharing.
You don’t have to go searching for a download of Pages and the other iWork apps. Apple used to charge for access to iWork. It stopped in 2014. If you have a Mac, it’s already installed. You can also download it from the Mac App Store.