BBEPC Shader PE 1.12 to 1.14 [no lag]Published Nov 8, 2019
it requires optifine to apply it so make sure to have it :D
It's made by 4 Minecraft PE shaders in 1 joint - the same is still in beta so some little things are missing. Water, lighting and shadows from the sun made as real as possible.
You can install this package on absolutely every device and don't worry about the lack of RAM and weak CPU power. If you set the chunk renderer to maximum, then there should be small lags that pass quickly.