Well, the answer to that is quite simple: I would never charge someone full price for a drawing I did on my phone. That would be an incredibly dickish move. When people pay for my work, they get my best efforts and that means I’m working on my computer at home.

When I draw on my phone, I’m usually bored at work with nothing better to do. I’ve thought about doing some cheap phone commissions, much like how some artists will do quick batches of sketch commissions, but that idea fizzled right away. It would be a pretty legit conflict of interest for me to do paid art while at my real job and I wouldn’t want to get in trouble there. So my phone works will continue to be for personal pieces. I don’t upload them everywhere- sometimes not at all depending on if I like them or not. But Tumblr usually sees them first because the mobile app is so convenient.