 The study aimed to investigate the factors related to non-adherence to multidisciplinary treatment, MDT, recommendations and the effectiveness of a smartphone-based app in improving compliance rates with MDTs in breast cancer patients. The results showed that app use was independently associated with adherence to adjuvant treatment, decreasing the non-compliance rate for chemotherapy and radiotherapy but not for anti, HER2 therapy or endocrine therapy. This article was authored by Jinyu, Jiayi Wu, Ohuang and others.