Recs.
Updated
Quip is a team based document sharing and editing communication app. Users can create and edit documents and spreadsheets while also being able to communicate through text with anyone that has been given access.
Specs
Pros
Pro Private document sharing
Files can be shared with others via a URL. The owner of the shared document can set it to be in read-only mode or they can allow anyone to edit it. Collaborators don't need to have a Quip account to participate. This feature makes for a great Evernote alternative, for those looking for a different app that has this similar function.
Cons
Con Not really free with stringent controls on trial
The trial is content limited which means if you start using it quite a bit they'll pick the perfect moment to swoop in and start charging you. It's better for them because it means they can look at your account and pick the best time to ask you to pay (hey we notice you're using Quip lots and have a new project you just started how about you pay now or you lose everything).
Con Can't rename files
You can't really rename documents per se in Quip. What you do is put the first line of the document as its title, so that it is displayed on the main list of documents on the app. The program suggests to combine it with a HL (Large Heading) format.