Protect your files with encryption and carry them safely on a pen drive or put them in Dropbox or other public clouds without fear of unauthorized access.
You can access them from any device where you have the application.
Are you on a computer that doesn't have the application installed? Don't worry about it! You can access the web application with your login and decrypt your files by dragging them to the browser.
Send short-lived documents as Snapchat does with photos.
Give it a lifetime or remove remote access whenever you want, even after you've sent it!