I don’t know how it compares to Windows and Android, but in South East Asia I get “mobile prices” on my iPhone and they’re actually lower than on the desktop.
That's what they advertise, but multiple times when checking the price is absolutely the same on desktop (from a different account). They've already been caught in false advertising so i don't see why they continue to do it
Prices are so flexible I usually find a hotel and then Google it to find a better price, even if I end up on the same site. The worst thing is when they advertise a price without taxes, which unfortunately is not illegal in most of the world. I think in Europe you’re required to show the final price.