The prices for in-app purchases (IAP) and subscriptions like YouTube Premium and game memberships are generally lower on Android (top) compared to iOS (bottom). If you use Android, you'll save more and can still access the same content on Apple devices at a more affordable cost.
I recall a report or something that was done a few years back about how iPhone users spent more on the app store vs Android. Developers of predatory apps like this will take advantage of that and mark up items. Unfortunately it must be working with how long this stuff has been around.