Automated stack: participants could simply register their wish to speak via the press of a button in the app.
Benefits:
- participants can fully focus on the discussion instead of trying to get the facilitators or stack-keeper’s attention in order to be added to the list of speakers
- The list of speakers would be transparent to all participants, thus helping them to gauge how much time each speaker realistically has, given the total time available
- stack-keeping rules could be implemented automatically, such as a gendered list of speakers or other quota rules, such as giving privilege to speakers who have not yet spoken on the topic.