Stage 1 - Development of Arm Volume Measurement Device and Mobile Application; In this stage, the preparation of the mobile application content, the development of the arm volume measurement device and the establishment of the connection unit will be started. Then, these systems will be brought together and feedback will be received from the survivors. In this process, initially 5 lines of work will be carried out simultaneously in the research. These tasks are (1) creation of exercise content and videos, (2) creation of training content, (3) determination of the problem areas experienced by breast cancer survivors through qualitative interviews and determination of the solutions applied by the survivors themselves for these problem areas, (4) development and calibration of the strain sensor and connection unit, 5) expert and user opinions will be taken for the developed mobile application.
Stage 2 - Evaluation of the Effectiveness of the Developed Product; Three simultaneous evaluations will be used in this phase. For this, there will be two research and one end-user feedback. These are; (6) feedback from survivors on satisfaction, usefulness and usefulness after using the product, (7) a pilot randomised controlled trial to evaluate the effectiveness of the developed product and (8) a reproducibility study comparing the developed product with the existing volume measurement method.