Kitizen Science wants to build a better evidence base about how sterilization programs affect free-roaming (feral) cat populations with the applied goal of learning the most effective ways of reducing cat overpopulation using cat-friendly methods. As a citizen science program, we offer a scalable population monitoring solution that can be deployed in multiple locations for less than the cost of traditional academic research. Our app is for use in organized cat surveys taking place in locations where we have a monitoring project. Visit our website to find a location near you and learn how to get involved.