Want to know any good software for me to manage my photo album in IPAD ?

Notice Apple's standard 'Photos' not allow me to group or create the subfolder.
What I want is to create the subfolder so I can group my photo.

I tested using IFILES and it allow me to create the subfolder as I wanted, but notice
when browsing the photo through build-in "Image Viewer", it actually a bit lagging
if to compare browsing the photo using standard 'Photos' application.