I'm looking for an app on my iPad the would be able to do the following: Open up an .xls file from email Be able to edit xls file from open office (Mac version) Send xls file as an email attachment. I don't need any crazy features just basic calculations like addition. Dropbox features would be nice but not mandatory. I've looked into Numbers but I don't really need all of the features and would rather not spend that much money if possible and I use open office on my MacBook Air so it needs to be compatible. Any thoughts?