The free version uses photos I've made and then curated but behind the paywall is also timer where the images are generated for each pose. There is a settings option where you can customize these gens and get the specific kind of drawing pose you want to practice.
What do you think!?
Also, the gen is kind of expensive, especially if you want to sketch with this everyday (the $20 option is what you would probably need to sign up for.) Any ideas on how I can get that price tag down?