Shaders for Minecraft PE

Enough I am tired of these shader apps not working! I’ve tried for 2 years now and now I almost give up and I immediately deleted the app cause like always all shader apps don’t work one looked like Minecraft alpha when I press on open for the shader I pressed it a million times and didn’t work some shaders were a scam and like always all the shader apps NEVER work and by never i mean NEVER. Reply please.