Q: i can't find pages in the "open in" function when i'm trying to open a .pages file from the internet. ***? how do i solve this?

i have tried both from my ipad and my iphone.

i have googled and found something about deleting apps that are on the list to make place for pages, not working for me. and even more irritating is that a couple of the apps arn't working at all with the .pages file, so i can't see why they even should be in the list. how can i managed this list.