Write an Android app

I want to develop a simple application to help travelers connect with other travelers and join their trips or plan a trip together. Each user has to sign up and create a simple profile with basic informations (name, surname, age, occupation, photo) any user who is going on a trip, can upload its itinerary in the app (listing the cities he is going to visit and a short description of their trip). All the itineraries uploaded will be visible to other users that can filter them (for examples by selecting a city comprised in the itinerary) and if a user wants to join one of these trips, he can get in contact with the other user and arrange their meeting through a chat. It is a simple way to help solo travelers to find travel buddies, or just a way to share the travel experience with new foreign people.