Explore a groundbreaking conference talk presenting an innovative iPhone app designed to assist blind individuals in backtracking routes within buildings. Discover how this system, controllable via Apple Watch, creates a path representation using turn sequences and step counts, requiring no building maps or environmental modifications. Learn about the app's ability to provide spoken directional information for backtracking, and gain insights from the controlled indoor experiment conducted with six blind participants. Delve into the potential impact of this technology on improving mobility and orientation for visually impaired people in indoor environments.