Just started using the app, I usually use the computer based program. Love it, except for a couple of things. I thought the app might be able to add pdf pages to the word document but it can't (program can't either, it's why I tried the app). I don't believe any program can do this so I'm not that disappointed, it would be nice though.\ I really want to know if the person whose formulas disappeared tried reopening in the app then saving elsewhere.