Batch Editing in PS Express

Hi all,

Have been painstakingly searching to no effect. I uncovered the secret to inverting colors on the Photoshop Express app on my iPhone, but have now run into the issue of being unable to batch edit the photos on my phone.

I have hundreds of pictures that I simply need no more than to invert the colors from positive to negative. I already have the saved preset. Is there a way to do this to the pictures en masse? It would be quite frustrating to have to do this one at a time.