Microsoft’s Android port of its Office productivity apps is quite solid. You can get some serious work done on Android devices using these apps. However, if you’re using a fairly old device, you may want to take note, as Microsoft is discontinuing support for Office mobile apps on older Android devices.
Microsoft has updated the system requirements for the Office mobile apps without much fanfare. It’s not surprising to see that this has happened as the move is meant to ensure that users get the best possible experience with the apps. That can often no longer be possible on devices that become outdated.