coolweatherjetpack is a Jetpack-based implementation of the CoolWeather Android application built around the MVVM architecture. Its structure separates responsibilities into UI, ViewModel, repository, local data, and network data layers. Activities and fragments form the UI layer while ViewModels retain interface-related data and communicate with repositories. The repository determines whether requested information should come from local storage or a remote service. Local persistence is implemented with LitePal, while Retrofit retrieves information from web services. Dependencies flow in one direction between adjacent layers, making the project a practical example for learning structured Jetpack and MVVM development.