Thanks for your kind words with regards to the app and well done for getting such a high score!. I agree that BCC is often subtle. My practice is also largely focused on skin cancer. I would say that the majority of melanomas (and SCCs) that I diagnose would be obvious to a patient that underwent a short period of focused training and checked their skin regularly. A possible explanation for the difference in our experience is that the incidence of skin cancer (and also atypical but benign moles) a lot higher in Australia than in the UK.