For a full readme with documentation enter on the Server folder.
This project was live and worked for more than 2000 users, but I removed the client from the stores because I could not promote the app and didn't want to pay the cost of having it live. Currently I'm working on a new client that will be more suitable for a wider kind of users. This means the client is a work in progress and the server is complete and fully functional.
This is the repo of the React Native client that is complete and fully functional but not live anymore: https://github.com/fermmm/group-date-client-rn
This project is license under GPL, which means you can make a comercial product out of this code but it has to be open source.