Android Travel Application: This application is an Android-based travel app. Users can log in/register on the application, and their information is stored in Firebase, a cloud-based NoSQL database. Upon logging in, users are directed to their profile page, where they can view their personal registration information and upload a profile picture using the device's built-in Camera app. Users can select a country and retrieve information about it compared to their current location. For instance, they can obtain information about the chosen country, search for flights to the specified country, use a currency conversion calculator, or view a map of the selected location. These services are provided by online REST APIs, such as Google Maps API and restcountries.eu.