This is very cool. I know this is a serious problem in my daughter's school with 5th graders... ie 10 years old & they aren't allowed phones at school. I wonder if there a viable asynch solution, ie via a browser...
I'm guessing it's pretty common for there to be a phone ban at schools these days, so hopefully Sit With Us has a story for that... Maybe they can coordinate via the app at home the night/morning before school?
Then everyone knows that you're sitting with the Sit With Us kids - the beauty of the app is that new kids can just take a seat without any visible distinction.