> 1. Developers charging for apps and downloads from Google Play must use Google Play's billing system as the method of payment.
> 2. Play-distributed apps must use Google Play's billing system as the method of payment if they require or accept payment for access to features or services, including any app functionality, digital content or goods.
> 3. Apps other than those described in 2(b) may not lead users to a payment method other than Google Play's billing system. This prohibition includes, but is not limited to, leading users to other payment methods via:
> An app’s listing in Google Play; In-app promotions related to purchasable content; In-app webviews, buttons, links, messaging, advertisements or other calls to action; and In-app user interface flows, including account creation or sign-up flows, that lead users from an app to a payment method other than Google Play's billing system as part of those flows.
> 1. Developers charging for apps and downloads from Google Play must use Google Play's billing system as the method of payment.
> 2. Play-distributed apps must use Google Play's billing system as the method of payment if they require or accept payment for access to features or services, including any app functionality, digital content or goods.
> 3. Apps other than those described in 2(b) may not lead users to a payment method other than Google Play's billing system. This prohibition includes, but is not limited to, leading users to other payment methods via:
> An app’s listing in Google Play; In-app promotions related to purchasable content; In-app webviews, buttons, links, messaging, advertisements or other calls to action; and In-app user interface flows, including account creation or sign-up flows, that lead users from an app to a payment method other than Google Play's billing system as part of those flows.
[1] https://support.google.com/googleplay/android-developer/answ...