This thesis was commissioned by SSAB Raahe coking plant. The coke plant had a need for a mobile application to quickly obtain information about the process status. The aim of the thesis was to create a cross-platform mobile application for production, serving as a real-time monitoring tool. Real-time monitoring would enable quick responses to potential disruptions, in order to avoid possible production interruptions. The work was carried out using Microsoft Visual Studio Enterprise to build the application with .NET MAUI and create the software interface with ASP.NET Core Web API. As programming languages, C# programming was used to implement the application logic and XAML programming to build the user interface. The materials for the thesis were gathered from relevant websites related to the subject area. As a result of the work, a functional application for Android devices was obtained, consisting of four different pages as per to the wishes. The front page displayed weather information, while the other pages included a schedule for oven unloading, a table depicting the difference between morning and evening shifts unloading time to the optimum, and a bar chart of push and pull power maximum. The application operates according to the set goals, and data is transmitted to the application rapidly in real-time. However, there was a slight deviation from the goals since the application was not developed for iOS devices. Creating the application for iOS devices would have required a license from Apple as well as a MacOS computer.