Health wearables are one of the more established elements of the digital health revolution. GPS-enabled watches have been successful training aids for amateur and professional athletes for well over a decade. The ability to miniaturize complex biosensors to enable remote vital signs monitoring, disease progression and treatment effect measurement are all very real opportunities worthy of the hype. Early versions of these tools, however, were not Internet-connected and were not capable of being tethered to a cellular and or Internet-enabled mobile phone. In order for these devices to reach their potential for patients, understanding their risks within the context of the entire connected ecosystem must occur.