Why would you need an app for this.. When you familiarise yourself with the symbols, you can see it. Let’s not attribute magical thinking and outsource critical thinking to an app as if the app is the magical all-knowing sorting hat in Harry Potter.
The program would recognise shapes but it would struggle to identify that the weird swirl and dot in a hospital logo represents a figure that is making the “as above so below” pose. It might tell you that the logo is in masonic blue and white but you already knew that..