It's going to be one of those "this mole doesn't fit ABCDE so see your doctor" things I would imagine since no doctor can know without a biopsy either other than there is no reason to waste time on one because the mole is fine.
As ever it's one of those things built for the non anxious to use just like Dr Google. The fact HAers misuse technology to fuel mental health problems is not in the minds of the designers just as the news outlets aren't bothered about GADers who are triggered by the doom & gloom on the news.
From a consumer point of view my first question would be how reliable is it and who has confirmed that. Anyone can build an app. As utrocket says no one can know and it opens up a question over whether it could say you are fine when you are not. But does this just take a photograph and pass it to someone on the other end who is trained to check?
Not a good idea for a HAer but not because of technology and because of the mind of the HAer that needs to be changed.