My collegues (All Windows users) will send me emails compressed as a .zip file. I can get as far as opening in Box but then I cannot unzip it? Anyone--please help!!!
There are several apps that open .zip files on the iPad (disclaimer: I've never opened a zip file on my iPad; these ideas are from a Google search).
You can try the apps Goodreader, Zip File Viewer, Readdle Docs and Filer. The apps Goodreader and Readdle Docs came up in the search more often than the others, with people saying Readdle Docs allows you to not only open the zip file but also to send them (for opening in various apps).
Hopefully, someone will tell what they've used ... successfully.