Guys I have nothing against Your project,but it seems to me that few people will use the services of Your platform.I chose one barber shop for myself and constantly go there. Why do I need to know what master is free?I need to make one call and I'll have all the information.Perhaps in some metropolis your application will be relevant, but in small cities it is just to nothing.
I live in a town as small as 100k residents and it is a problem there. Try to get a next day appointment without calling every single salon in your are and you will see how difficult it is.