Apps that do mean stacking to simulate slow shutter speeds and focus stacking apps?

[babybunny]

I'm not talking about camera apps. I'm talking about apps where you import your photos and they stack and process them.

Photoshop on the desktop does it. You import a bunch of frames of something like a flowing waterfall and it stacks the images together using mean blending and you get a final image with blurred water, simulating an ND filter.

PS will also do focus stacking for things like macro photography.

Are there equivalents on Android?