An iPhone Case That Takes Your Vitals

Introducing Wello, a stealthy smartphone accessory that also tracks your health.

The future of basic medicine is starting to sound like science fiction: the tricorder from Star Trek has been brought to life by Scanadu, a startup at NASA's Ames Research Center. Meanwhile, biotech companies are developing pills embedded with sensors to track how patients respond to medication--once they've swallowed them.

Wello is the latest in the line of health-gadget innovations. The handheld device is made from microelectronics and nanosensors and can measure vitals like temperature, heart rate, blood pressure, blood oxygen, and lung functions. The best thing about Wello: It lives in your iPhone's case.

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