You need to create a mobile application

You need to create a mobile application with the ability to interact with several sites via API. The application is not for mass use, but for personal use. The application should pull out quotes of currencies of certain pairs through the API, which should be able to specify through the application, then it should calculate the probability of winning when betting on a decrease and on a rise according to my formulas. Formulas should be able to be set through program settings. All the graphs and graphs should be in one window. Count on a resolution of 1024x768 approximately. There will be 6 sites in total. You also need to be able to specify the size of the bet for each site and press one button - bet on either a raise or a decrease.