Strange growth on your skin? Take a cellphone pic and view the app’s diagnosis.

There are several melanoma detection apps currently on the market. Some allow the user to track changes in growths on the skin; others determine whether a lesion seems cancerous.

But doctors have criticized the accuracy of these apps and fear they will discourage annual visits to dermatologists, whom they say can examine the entire body for a more accurate diagnosis. A 2013 study in JAMA Dermatology looked at four apps and found they missed 30 percent or more of skin lesions, which can spread to other parts of the body if left untreated.

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