1st, Apple and Google do not Allow adult / porn Apps to be sold / marketed via the itunes store or the Play Store
2nd, Current Screen resolution on Smartphones would require 1080p or 4K size clips.
With Each Card weighing in at around 1GB to 1.5GB per card..
Even if Apple or Google Allowed an Adult Porn App on the Phone...
how many Cards would the phone be able to Hold?
if you're like me, my Phones storage is filled with all the photos I take..
I have to back up my Photos just to make room on my phone for New photos..
There is no way I could have More than 1 card on my Phone.
It is Not a Mobile App, it's a Desktop app.
Making a light weight, lower resolution or Shorter Clips version to work on a Smartphone, would totally take away from the Alure of the product.
For now, you are better, using your Phones web browser to go view all the other porn sites / videos on the phone.
I just don't see this Product being a success on the Phone, if they would have to make compromises to do it.