Exporting or emailing tasks in the desktop or Mac version is simple. With AppleScript you can pretty much do whatever you want.
The capability does not exist in the iPhone version. It does exist in the iPad version albeit rudimentary where you can only email a single task one at a time. One needs to be able to send a list of tasks at once.
But emailing is the most basic means of sharing tasks and is not especially good for real collaboration. There needs to be some sort of server connection and the ability to share server records through a cloud connection.
The capability does not exist in the iPhone version. It does exist in the iPad version albeit rudimentary where you can only email a single task one at a time. One needs to be able to send a list of tasks at once.
But emailing is the most basic means of sharing tasks and is not especially good for real collaboration. There needs to be some sort of server connection and the ability to share server records through a cloud connection.