We make intuitive, interactive tools to help you explore Financial Independence possibilities on your own. We're fans of pretty charts.


We're honest about our assumptions, and we state them up-front. If you see a mistake, challenge us. We want to be thorough, and we want you to believe us.


We take the time to write out our derivations, so that anyone can reproduce our results, and follow our thinking. We try to make these as accessible as possible.