The Sustainable Development Goals (SDGs) are a blueprint for achieving a better and more sustainable future for all people and the world by 2030. It is a universal call for everyone to act in order to protect the earth and improve the lives and prospects of the world. A green mobile application has been developed in assisting the user to achieve various SDGs. This paper discusses developing a green mobile application - Thrifteal, which focuses on Sustainable Development Goal 12 in ensuring sustainable consumption and production patterns. In order to achieve Sustainable Development Goal 12, a detailed understanding is needed of how human food consumption affects the planet. According to the Secretary-General Sustainable Development Goals, worldwide material consumption has expanded rapidly, as the material footprint per capita jeopardises Sustainable Development Goal 12 more broadly. On another note, food waste is also indicated as the primary type of waste that goes into landfills. Therefore, the project's main idea is to overcome the food waste problem at the individual level by offering two modules that will contribute to a sustainable lifestyle, such as an expiry date tracker for short shelf-life food and food sharing. In addition, this application will be developed using the Android Studio software system and based on the Waterfall Methodology. This project aims to prevent users from throwing away food that is still in good condition and sharing food with the needy.