Apple CEO Tim Cook gave a shout-out to a $100-per-year app for doctors — here's what it does

• Advances in machine learning now mean that doctors can take a photo and identify the disease or condition depicted.• Apple is a fan of one specific app, VisualDx, that uses new machine learning software to assist with diagnosis on an iPhone.• VisualDx has built a database of 32,000 high-quality medical …