I'm curious as to how all of you prioritize design tasks, send mockups, gather feedback, iterate, etc, with clients. Is there one app that can handle it?

As of now, I use Asana and make a to-do list for each client, then invite them and allow them to update the list to their liking. I also pin a few 'tasks' to the top and use those to store links to design revisions. It sounds convoluted, and it is, but I can't seem to find a better way to organize designs with their metadata other than sending tens of emails and attachments back and forth.