Hi there, I am Justina from Ailuna mobile app team. We’re building a free app that helps you develop habits that are good for you and the planet. It contains fun challenges and hacks that make our everyday habits more eco-friendly. It does not have a carbon footprint or impact calculator YET, but it does offer a nice way to get on this journey and also share it with your friends. It is already in the app stores, but not complete - you can test it though! ;)