When selling online content, it’s important to deliver the correct content to the right user. As you design your In-app Billing implementation, be sure to follow the security and design guidelines. These guidelines are recommended best practices for anyone who is using Google Play’s In-app Billing service.

For more information about in-app purchase, visit:
* In-app Billing Reference: http://goo.gl/FFQt9I
* Selling In-app Products: http://goo.gl/cnKRX1
* Security and Design Guidelines: http://goo.gl/Z9xrq7

Download the in-app billing sample application Trivial Drive: https://goo.gl/Jd9CW9

Watch the Zen of Monetization series here: https://goo.gl/EqvweO