Prothelis - your everything finder app! The Prothelis app helps you to keep an eye on your loved ones. Together with our GPS trackers, this app offers reliable escort protection for people with special protection needs (children, seniors, extreme athletes, etc.) and also for securing valuables of all kinds, as well as for locating pets and farm animals. Any number of trackers The Prothelis app enables you to have any number of GPS trackers in view. See where the GPS trackers are at the m