If the cost of In App currency is the same between iOS and Android what is the incentive for the user to put down their iOS device, pickup an Android device to make the purchase, and then switch back?
Even if the developers segment their customers and make In App currency "cheaper" on Android because Android users have a reputation of not paying as much as iOS users it still sounds like a pain in the ass for marginal gain on the end users part.
I can't imagine this happening often enough to threaten platform lock in or meaningfully skew platform monetization statistics.
I'm talking about the kind of platform lock-in where your next phone needs to be an iPhone because your last one was, or where you buy an iPad because you have an iPhone and you don't have to buy the apps again. That's the kind of lock-in that is threatened by platform neutral IAP. You play Candy Crush on your iPhone when you are out, but when you are home you play on the cheap Android tablet you got because it has a bigger screen.
Even if the developers segment their customers and make In App currency "cheaper" on Android because Android users have a reputation of not paying as much as iOS users it still sounds like a pain in the ass for marginal gain on the end users part.
I can't imagine this happening often enough to threaten platform lock in or meaningfully skew platform monetization statistics.