2015
https://github.com/ufna/VaOceanMobile
Ocean shader created for mobile games on Unreal Engine 4. Yes, exactly! It looks the same on mobile and works really fast!
Tested both on iOS and Android devices :)
Sure, this ocean shader has limited set of features in comparsion to desktop alternatives, but the key goal was achieved - it's fast, nice-looking for topdown view and works on mobile devices and web.