(Googler, opinions my own. I also do paymentsy things.) Carrier Billing has definitely gotten better and easier. From the Google Play side of things, there is

(Googler, opinions my own. I also do paymentsy things.) Carrier Billing has definitely gotten better and easier. From the Google Play side of things, there is an API that is used to help with things (no public docs I can find sadly). If you want to get a feeling of what it looks like, you can check out Standard Payments: https://developers.google.com/standard-payments/ https://developers.google.com/standard-payments/