Planet.A is a mobile app which calculates your carbon footprint through questions that you answer and through apps already on your phone, then gives you weekly improvements to make in order to reduce both your footprint and negative impact on the environment. It is designed to be fun as you receive rewards for your efforts and can compete against your friends. As my submission for our Developing Interactive Media project, the idea arose from my passion for saving the planet and drive for sustainability. With a weekly, monthly and yearly Round-Up, Savings section and Recycling Scanner, Planet.A focuses on the impacts humans have. The topics it focuses on include: food, transport and phone radiation signals. The entire experience has been developed to be a positive way to improve the your impact on Earth and your lifestyle. As they say: 'there is no planet B', so this is Planet. A.