I have a Unity Mobile app that has a web UI that we are using PayPal IPN. I was wondering if anyone knows if PayPal has to approve the app before it goes live if its using IPN and not the mobile SDK?
In order for you to use IPN, you do not need any approval from PayPal. All you need to have is a PayPal account and some integration with the IPN listener. From there you are good to go with the IPN. I hope I answered to your question.