San Francisco-based Azoi announced Wello, a smartphone case that measures a user's vitals including blood pressure, electrocardiogram (ECG), heart rate, blood oxygen, and temperature.

"All too often, health problems go undetected until they are too late to address," Azoi CEO and founder Hamish Patel said in a statement. "We believe that through improved self-awareness of key vitals, technology could very easily reduce the incidence and impact of a wide range of illnesses and diseases. Not only could this help ensure healthier, happier lives, but it could also ease the growing burden on healthcare services."

To record their vitals, users place their fingers on four spots located on the smartphone case. After waiting a few seconds, the Wello companion app, available on Android and iOS devices, will show a readout of the user's vitals information. The device has a battery life of two months if used every day.

The device is waiting for FDA clearance, but in the meantime users can preorder it for $199. The company plans to ship devices to the US after they receive FDA clearance, which they expect in fall 2014.

Azoi expects to ship the device to the UK, Singapore, Canada, Hong Kong, China, and India starting in the summer of 2014.

Although the app is available on iOS and Android platforms, the Wello case is only compatible with certain iPhones. Users must use Wello as a standalone device with all other phones.

While Azoi has only added Fitbit integration, it plans to partner with other digital health device companies in the future.

Azoi also mentions that it will offer an additional attachment to the phone to measure lung functions, although the company does not specify which lung functions it will measure.

AliveCor, which makes an iPhone case that can measure ECG, received FDA clearance in 2012 for its device. AliveCor also recently received FDA clearance for a "universal" ECG peripheral that works with most Android and iOS smartphones and tablets.