Indoor Navigation System is a technology which enables us to navigate through the indoor surroundings of a building, just like we use Google Maps for outdoor areas. Our project revolves around implementing this technology in the form of an app which will be used to navigate a user inside a building. Our goal is to create an app that will provide us with an interface to navigate a user in the indoor surroundings of a particular building. We will implement this by using Wi-Fi localization, which is a technique to get the location of the device by connecting to Wi-Fi routers available in the building. Mapping of the building or a particular floor will be done by dividing the map in to grids. In each grid the application will learn the RSSI values from the routers to get the current location of the user. Admin will have the rights to import the map of any particular building.