As far as I know you can't do that on iOS. There's also nothing stopping the devs from selling IAP themselves on their own website. So no, Steam is much much more open than Apple's App store. Not to mention the fact that Steam is completely optional and the App store is not.
As far as I know you can't do that on iOS. There's also nothing stopping the devs from selling IAP themselves on their own website. So no, Steam is much much more open than Apple's App store. Not to mention the fact that Steam is completely optional and the App store is not.