How to disable all in-app purchases in Android?

Question

Android

How to disable all in-app purchases in Android?

Answer 1

put another card in any way
or without a card at all - this is not iOS (and in iOS it is possible without a card)

Answer 2

Prohibit, probably not. But for payment, you need to enter a password from a Google account or poke a fingerprint (see in the playmarket application in the settings "authentication upon purchase"). This option applies to all purchases in the market (including in-app).
Again, I note that the phone can have alternative stores as pre-installed (for example, on Samsungs there is Samsung, in addition to the playmarket) or which you can install yourself (such as the same Yandex store). I can’t guarantee that they have similar settings (but in any case, you will first have to link a card there in order to buy something ... but why do you need it?)
By the way, I note that the application may have alternative ways of in-app purchases that are not controlled by the system (for example, the Vkontakte application allows you to buy stickers in four ways, only one of which is the playmarket). I don’t know how allowed, before that I was completely sure that you can’t pay anything past the playmarket in the playmarket, but Vkontakte provides 100% alternatives (I won’t say for other applications because I don’t know)