Meet the Accutension: a smart blood pressure kit that pairs with your smartphone to provide you with accurate and reliable readings. It determines your blood pressure by listening to the sounds of your blood flow. The companion app lets you record and visualize data. You can playback the sounds after measurement to make sure you have done it right.
The developers are offering Accutension in 4 models (Stheto, Classic, Cuff, and Doc). The device is expected to be compatible with iOS and Android devices. More information is available here.