Just follow the simple steps below for a one-time setup.
Step 1: From the app, you want to purchase, click on the price button
Step 2: Accept the access condition
Step 3: Click 'Continue' to set up payment method
Step 4: Select 'Enable Digi billing'
Step 5: Enter your name and address – for billing reference
Step 6: Select 'Buy' to proceed with the purchase with Digi billing
Step 7: Enter your Google password and select 'Confirm'