Seriously, this app is like cheating your way through the artist's struggle. If I had a time machine and went back to tell my teenage self that I could make art like the 3 pics below, he'd try to slap some sense into me.
The app does a great job of what it is intended to do. Kudos to the team :)
One issue i had was, to apply artwork for an existing photo, i'm made to scroll through thousands of photos instead of going directly to the album view to select the picture of my choice.
I'm curious how you're running this. Server side rendering with https://github.com/jcjohnson/neu... ? Keeping the conversion to under a second sounds like a big technical feat. I've personally looked at developing some cloud hosted autoscaling Neural Style systems for video and the horsepower required is out of control.