Lars Grieten is the co-founder and CEO of FibriCheck. Previously, he worked in Ziekenhuis Oost Limburg as the program manager of the Future health department, was a senior researcher in the wearable health solutions department at Holst Centre Imec and was visiting professor at Hasselt University for digital health. Lars’s father got a stroke in 2016 from which the cause was not found. After using the FibriCheck application the cause; a heart rhythm disorder called atrial fibrillation; was found. This enabled physicians to provide appropriate therapy to prevent his from happening again. FibriCheck is a medical smartphone app that is certified as a diagnostic tool that uses the smartphone camera to detect cardiac arrhythmia’s. The app is only available on prescription which keeps a doctor in the loop to strengthen the trust and credibility. The software and algorithms enable scalable models towards implementation of diagnostics in real-life and make primary prevention for strokes a step closer.