The Israeli start-up “Healthymize” has developed a completely automated cloud-based app that analyzes voice patterns in order to detect illnesses. The technology was duly awarded first prize at a recent medical start-up competition, and will now begin an international test phase. Healthymize was founded by Dr. Shady Hassan and Daniel Aronovich. Both men studied at the Technion in Haifa. Hassan is a doctor from the Druze village of Julis in the north of Israel. Aronovich is an electrical engineer.

The app listens in on telephone conversations, but it’s not the words spoken that are important. Rather, it is...