The following is the project structure of the Xcode project where the .mlmodel file is imported and used for prediction:

The ViewCcontroller.swift file is where the model file created is used and the housing prediction is carried out in a mobile application. 

The housePricer.mlmodel file is the model file that was created using scikit-learn and converted into the ML model file using the Core ML converter tools. This file is included in the resources folder of the iOS Xcode project.