I am working on a android quiz game app. First version will come out with 2 categories of questions. I was wondering how to add an update with another category of questions without losing progress for players who already played first 2 categories on Google Play Store.

I am working on a android quiz game app. First version will come out with 2 categories of questions. I was wondering how to add an update with another category of questions without losing progress for players who already played first 2 categories on Google Play Store.