Stress is a silent killer. Three out of four doctor’s visits are for stress-related ailments, reports the American Institute of Stress, and stress increases the risk of heart disease, heart attack, and stroke by 40 percent, 25 percent, and 50 percent, respectively.

London-based, Will Smith-backed BioBeats aims to treat this condition, and it’s well on its way to doing so. The startup today announced a $3 million funding round led by Oxford Sciences Innovation (OSI), White Cloud, and IQ Capital, following on the heels of a $2.28 million funding round in April 2016.

“For BioBeats, our vision is to disrupt the way stress is viewed and treated on a global scale,” Dr. David Plans, founder and chief science officer, said in a statement. “Our approach focuses on challenging the conventional approach to addressing the pandemic of stress and its relation to mental health, cardiovascular disease, and other poor health outcomes. We are truly at a turning point in the digital health revolution, and this latest round of funding will help us achieve remarkable advances for our platform.”

It all starts with a smartphone app called BioBase.

The app’s core component is an eight-week course consisting of coaching topics, exercises, audio sessions, and surveys surfaced by an artificially intelligent (AI) recommender system. Logs and measurements inform its pace and curriculum. If you’re feeling particularly stressed one morning, it might suggest a focus exercise in the afternoon, or physical activity and a “mind stress check” after work. It supplies insights over time, such as the locations and…