This Limited physical reserve capacity in older people might be a risk factor for further functional decline and complications after surgery. Shorter time between diagnosis and cancer surgery has made it more important to focus on effects of a short exercise program with high intensity and frequency. Studies have shown that patients with cancer need personalized support to perform preoperative exercises and that they prefer to do it at home or close to home. This work describes the development of a digital application consisting of exercises, feedback on performance, support, and motivational features