Predicting death has long been a fascination for mankind, and now a new app promises to narrow the end of your life down to the nearest 36.5 days. Experts in Russia designed a free app dubbed Gero, which uses AI to analyse activity data from your phone accelerometer to estimate your lifespan within a tenth of a year. When combined with information recorded by wearable fitness monitors, this prediction becomes even more precise. The estimate will even be revised downwards if you don't keep up with your healthy living routines, hopefully adding an incentive to stick to them. Exactly when we shuffle off this mortal coil has long been a fascination for mankind and a new app promises to narrow this down to the nearest 36.5 days.