Low poly sea

Hello, sorry for my English.
I would like to do a low poly ocean simulation, how would it be better to do this?
Shader or animation, shape-key animation does not work for me, maybe I’m doing something wrong, do I need to insert the bones?
Tried the displace material, but it does not work correctly on mobile settings

The material_displace example might work for you, but I don’t know if it works in the Mobile-preset and I think the automatically tessellated edges are being smoothed of so the low-poly effect isn’t great. https://github.com/armory3d/armory_examples/blob/master/material_displace/displace.blend

Thank you for your answer, if in mobile settings, the material is put full, then everything works, but the FPS drops strongly (from 60 to 20)
Xiaomi mi a1

maybe if your plane is already subdivided, if thats’s the case removing this (so it is just a single face) should give better fps. Armory automatically tessellates stuff and I don’t know if there is a way to disable it.