It was never mentioned in the complaint, but I thought Apple also had a policy that required in-app purchases to be priced the same or lower than prices offered

It was never mentioned in the complaint, but I thought Apple also had a policy that required in-app purchases to be priced the same or lower than prices offered outside the store... I found an article from 2011 saying they tried to do this but backed away. Are apps allowed to price, say subscriptions, higher on iOS than on the web? And if they aren't allowed to advertise the lower price on the web, isn't that anti-competitive, forcing iOS uses to pay more?