Wow a lot of criticism. I'm considering a similar business. I think this is too expensive when printing this is so easy these days. But charging some small about per printable coloring book would be very attractive.
The printing aspect of this wasn't too easy... I wish I could charge less but as it stands (especially with surprising API costs) I'm barely making a profit on this.
have something similar in the building pipeline, yeah the API costs caught me off-guard too. I knew it was going to be expensive but this is still pretty high