Privacy policy : 

• App uses third party services to show banner ads.
• Third party service such as firebase is to show update notifications and in app messages. This service collects data related to app performance and country of residence of user.
• App does not have remote database to store personal data of users, so there is no data theft concern for user. ( I personally use this app to test its performance)
• Firebase only collects location data (country of residence of user) to calculate billing depending upon location of use.