Can you really trust the medical apps on your phone?

It's never been easier to get medical advice. A simple Google search will come back with a series of symptoms and ailments. The doctor has moved into your pocket and there's an increasing number of apps that promise to give an accurate diagnosis. The premise of these Google Play and iOS App Store doctors is simple: an app will provide you with one (or in some cases multiple) suggestions... then the onus is on you to seek medical advice where it's needed. "There are different types of diagnostic tools out there," says David Wong, a lecturer in health informatics at the Leeds Institute of Health Informatics. Wong, along with colleague Hamish Fraser help me test three of the most popular artificial intelligence-powered symptom checker apps in the UK: Ada, YourMD, and Babylon.