this statement is not correct
you can use In App Billing extensions… only Ad extensions are not allowed…
But to use @pavi2410’s extension does not make much sense, because it is an outdated version of the now built-in in app billing component of Kodular, see also
However the built in billing extension still has some issues, which need to be fixed, see for example
I bought this (App Inventor Extensions: Billing | Pura Vida Apps) extension . Its work good but there is no any (when after purchased) block . then i publish it alpha production. Its work good. yesterday i have published it on production rollout. but google reject my apk for metadata policy violation. I have just fix it and republished. let’s see what happens next.
So today my application is approved by google. And also in app billing system work fine. A big thanks from me to *@Taifun * for give me his extension. I recommend to everyone who facing the same problem to use this extension (App Inventor Extensions: Billing | Pura Vida Apps). please ignore my bad english
Thankyou.