The Lighter Footprint App uses output data from the ecoCity Footprint Tool to support individuals interested in learning about how they can reduce their personal carbon and ecological footprints. The App provides an engaging calculator for both consumption-based carbon emissions and ecological footprint assessments across four domains (food, home, mobility, consumables). This enables citizens, and businesses, within cities that are already working with the ecoCity Footprint Tool to engage with information about their personal lifestyle choices and consumption patterns. The App also recommends ways to reduce impacts and helps people connect with others seeking similar solutions for ‘lighter living’. The ultimate goal is to enable cities and citizens to work together to achieve living within Earth’s carrying capacity, also known as one-planet living.