You have to develop Restorants app. People can find where are Restorants, they can get information , using firebase, and using google maps to find. App show only Restorants which signed up in our app. It means it will have 3 parts. 1 for people. Second for restaurants. And 3 is for me admin panel. People can chat book place in Restorants. Okay but I don't have api so, only Firebase or google sheets or Google Excel file you write gson files. This app for only Uzbekistan.