Digital diagnosis: How Your Smartphone or Wearable Device Could Forecast Illness

What if you could forecast sickness, before you even had any symptoms? Your smartphone and digital data might be able to help.

If you carry your smartphone with you everywhere, then it's probably already tracking a lot of data about you and your behaviour. If you have a wearable device, you'll be generating a multitude of fitness data too. Put it all together and you get your "digital phenotype" – a comprehensive picture of your health and well-being, kind of like a digital jigsaw puzzle.

When collated with data obtained from clinical assessment, such as blood tests and diagnostic imaging, it could generate valuable insights for health professionals to inform care planning. And there is increasing evidence that web data can