looking at the mole but the history that goes with it. technology may not be able to tell that when you just download an app. how do these work, though? basically by algorithms. they compare the picture to other pictures and some apps that score a little bit better that would have a board certified dermatologist look at the apps. even those apps miss 90% of melanoma. taking a picture and looking at a different picture several months later, if you have a different angle, it may rook like it s growing or changing shape. correct. and it may not be. right. which one do you like? there is an app called um skin check. it s a good app to keep an eye on the mole, take the picture that will send reminders for self exam. anything that s educational is good.