Hello Sr,
I´m glad that you invited me to look over your project. I´m just giving you the initial bid, but it would be really nice if you could provide some more details about this app. Like for instance:
1 - What information is shared among users?
2 - Will this app require login/registering users?
3 - What sort of information needs to be saved on the device's database?
Bests,
Yoanis.