Cloud storage and reminder apps seem to go together naturally - Evernote and Google Keep both have some basic attachment tools, and they share collaborative elements with things like Dropbox and Drive. Today Dropbox is trying to bring it all together with Paper, the company's first new app in quite a while. It's up on the Play Store in beta form, and like the primary storage app, it's free to download and use.
The basic setup is familiar to anyone who's used the standard notes or reminder apps: users can create new notes with a few formats that can then be shared. Paper has a few bells and whistles that others don't. If multiple users are viewing the same document, they'll see live updates. The default tab in the app is even "updates," which shows any new changes or comments on documents that you're involved with. The editing tools are impressive; there are extensive options for text sizing and formatting, and image support and direct camera importing are already supported.
Users can sign in with their Dropbox credentials, but you need to enable the Paper beta on the web first - go here. That's also the web portal where users can access all their documents from a standard desktop or mobile browser. At the moment Paper doesn't seem to offer much incentive to switch if you're a dedicated user of an alternative platform, but there's room for improvement, especially if Dropbox can add in some deeper integration with its shared storage tools.