We created this app to help with our Scrum planning meetings where each participant has to vote one number of a predefined set. We tried multiple tools to facilitate that but too often something went wrong. Someone forgot a password, someone list his or her network connection, etc. None of these tools worked smoothly. Then we went back to a setup where each of us had a bunch of cards and when it was time to vote we just showed one of the cards. Now we have Show of Screens: no delays due to technical difficulties anymore and we can just move on with our meeting.