Rocket lunch - stand-alone "Lunch train" alternative
You know lunch train for slack? Guess what: not every company is infected by slack. - But almost every company has groups of people that like going to lunch together.
So the idea is rather simple: a lunch train alternative as a stand alone app for the Browser, iOS and Android.
Mostly thanks to poor notification support on safari mobile atm., native clients for major mobile OSs are a must.