The Ossur Project is funded by the Icelandic company, Ossur, which develops, manufactures, and distributes non-invasive prosthetic equipment. For 20 years Dr. Gailey has fitted patients with prosthetics made by an Icelandic company called Össur, which has bestowed a research grant to Dr. Colby Leider and Dr. Gailey to design and conduct a clinical trial of a new mobile app that employs audio, visual, social media, and haptic (vibration) feedback. The various signals let users know if they’re walking in a way that could cause body fatigue, ulcers on the stump attached to the prosthetic, or stress on the non-amputated leg, which greatly increases risk of double amputation. The study involves the collaboration of trans-tibial amputees, physical therapists, and engineers. The project is coming to a close, as it leaves the laboratory for clinical trials in the next few months. Outcome measures include self reports, TUG, AMP, and 6 minute walk test.