A highly-portable step navigation assisting apparatus for attaching to just one footwear of the two footwear worn on a person during a navigation of a step change in elevation permits reduction in the amount of knee bending and fatigue of the person during the navigation of the step change in elevation. The step navigation assisting apparatus comprises a selected height platform with a platform bottom and a platform top； and a single attachment means anchored to a position within the front half of the platform and for passing over the footwear in front of the ankle for attaching the one footwear to the platform top. The step navigation assisting apparatus meets a long-felt need by disabled and elderly persons with a knee disability or other medical condition who need to navigate a step with both hands free
