The present single-center prospective exploratory study, conducted at Heidelberg University Hospital, assesses the feasibility of introducing a concept for additional patient care based on a mobile application for patients undergoing radiotherapy. Patients presenting themselves for the irradiation of thoracic or pelvic tumors will be surveyed regarding general performance, treatment-related Quality of Life (QoL) and symptoms and their need to personally consult a physician on a treatment-daily basis by means of a mobile application. The primary endpoint of feasibility will be reached when 80% of the patients have successfully answered 80% of their respective questions scheduled for each treatment day. Furthermore, treatment-related patient satisfaction and diagnosis-related QoL is assessed by PSQ-18 and EORTC questionnaires at the end of radiotherapy and at the first follow-up.

Inclusion Criteria:

• Indication for radiotherapy with potentially curative intent of a primarily thoracic or pelvic target
• Karnofsky performance score (KPS) ≥ 70%,
• Ability to initiate the therapy as an outpatient
• ≥ 18 years of age

Exclusion Criteria:

• Inability to give informed consent