The aim of this interventional study is to determine the effect of the mobile application on quality of life and supportive care in patient undergoing stem cell transplantation.The main questions it aims to answer are:

1. What is the effect of the education given with the mobile application on the quality of life of stem cell transplant patients?
2. What is the effect of the education given with the mobile application on supportive care of stem cell transplant patients?
3. What is the effect of the education given with the mobile application on anxiety levels of stem cell transplant patients? In the study, patients will be randomized into the group in which standard processes are applied and the group trained by the mobile application.

Stem cell transplantation has been used for more than 50 years in the treatment of malignant and benign hematological diseases and some solid tumors. The stem cell transplant preparation process is a complex treatment that requires close follow-up in the hospital and after the transplant. Studies indicate that patients experience more intense worry and anxiety during the transplant process. Nursing care during the transplant period includes factors such as oral care, nutrition, mobilization, taking preventive measures against complications associated with neutropenia and thrombocytopenia, and these interventions have a positive effect on the patient's quality of life. Aim of this study is to determine the effect of the mobile application on quality of life and supportive care in patient undergoing stem cell transplantation. In the study, patients will be randomized into the group in which standard processes are applied and the group trained by the mobile application. Functional assessment scale (FACT-BMT), James Supportive Care and Needs Assessment Scale in Cancer Patients and Hospital Anxiety and Depression Scale were planned to be administered to both groups on the day of hospitalization and discharge day, and 3rd month follow up. The mobile application content will consist of 3 modules: information about the stem cell transplantation process, stem cell transplantation and nutrition, lifestyle recommendations, and answering possible questions of the patients and their relatives. At the end of the study, the test results of the patient groups will be compared both within themselves and with each other. The effects of standard and mobile application training on the test results of the patients and whether the results of the group receiving mobile application training differ from the standard training group will be investigated.

Inclusion Criteria:

• Patients undergoing hematopoietic stem cell transplantation (autologous or allogeneic) for the first time
• Patients aged18 years or older,
• Patients able to communicate in Turkish as well as reading and writing.
• Those whose physical and mental conditions are suitable for participating in the research,
• Patients volunteered to participate in the study.

Exclusion Criteria:

• Being illiterate
• Patients not having a smartphone
• Patients not being able to use mobile application

There is not a plan to make IPD available.