Buy or Save is a Chrome extension designed to enhance your Amazon shopping experience by providing insights into the potential investment returns of your purchases. This tool calculates how much your money could grow if saved or invested instead of spent on products. It allows users to customize financial scenarios and evaluate the long-term impact of their buying decisions.

Key features include instant investment calculations over various time frames, the ability to set personal savings goals, and seamless integration with Amazon's interface. With a user-friendly design, Buy or Save ensures that both novices and experts can easily interpret results. Additionally, it prioritizes privacy by performing all calculations locally without collecting personal data. This extension empowers users to make informed financial choices while shopping online.