A family of Microsoft word processing software products for creating web, email, and print documents.
If you have a 365 subscription, ie Personal or Family, you can use it to install on any type of device that Office is made for: Windows, MacOS, iOS, Android etc.
.
As I understand it, even with a 365 subscription for iOS you have to download/install the applications individually
https://www.microsoft.com/en-ca/microsoft-365/mobile/microsoft-365-mobile-apps-for-ios
.
If you don't already have a 365 subscription, ask around your family and friends to find out if anyone has an unused "share" on their 365 Family subscription. They are allowed to share with up to 5 other people. Or someone who has 365 Personal and is willing to cost share an upgrade to 365 Family.
.