How to update Tabular Model on Device?

I'm trying to create a model to predict a user's screen time based on a variety of factors. I created a model in Create ML which works for me but this obviously wouldn't work for anyone else. How do I basically create a new model in the app using a new csv table and keep on updating that model as the user records more data and updates the csv file?

This is possible in playgrounds since I can use the CreateML framework but this isn't available on iOS.