On my Android I use bittorrent sync. It is available for iOS as well I believe.
It works similarly to dropbox but doesn't rely on any centralized server or storage limits like dropbox. And doesn't require any sort of signup or account creation.
This message has been modified
Originally posted on Sep 23, 2014 at 3:59:45pm
Message modified by supertux on Sep 23, 2014 at 4:00:12pm