Similar to how the payments system works on iOS, Google also allows third-party developers to utilise users payment details from their Google Play account to make purchases for subscriptions and various things within the app. Now Netflix is one of the latest apps to use Google Play Billing, Netflix has said that this will be slowly rolling out over the next few weeks.

This feature on iOS and Android just makes signing up for services much easier on your phone and this also removes the barrier to entry for customers signing up.

Source: Engadget UK