Laurence Pearce on How Your Phone Can Be Used To Detect High Blood Pressure

In this episode of Trail Blazers, Johnny sits down with Laurence Pearce, CEO and founder of Lifelight, a pioneering health technology company working to transform mobile phones and tablets into powerful healthcare tools.

Lifelight’s mission is ambitious but simple. Using advanced optical signal processing and software, the company has developed a way to measure blood pressure using nothing more than a smartphone camera. By analysing subtle changes in skin colour captured through the camera, the technology can detect blood pressure and pulse without the need for traditional cuffs or wearable devices.

During the conversation, Laurence explains why hypertension remains one of the most significant yet underdiagnosed global health challenges, affecting more than a billion people worldwide. Often called the “silent killer”, high blood pressure frequently goes unnoticed until serious conditions such as strokes or heart attacks occur. Lifelight aims to change that by making blood pressure monitoring more accessible, scalable and affordable.

Laurence also shares the story behind how the company was founded, the technical challenges of developing medical-grade software, and the enormous potential for smartphones to expand access to healthcare globally. From preventative health screening to enabling diagnosis in remote regions, the discussion explores how software-driven medical devices could reshape how people monitor and manage their health.

This episode offers a fascinating look at the intersection of digital health, medical innovation and accessible technology and how turning billions of phones into health monitoring tools could fundamentally change preventative healthcare.