How to automatically read data from firebase Cloudfirestore if there is change in data

Good morning everyone I want to make Bus tracker app so I am sending driver latitude and longitude to cloud firestore here I am using. Watchpistion() method to automatically update database when there is change in driver location. Now my question is that whenever user views driver location I need to get updated values from cloud firestore.

Is there any method to automatically read data when there is change in data?