Inclusion Criteria:  Adults (≥18 years); Written and informed consent; Diagnosis of solid cancer; Metastatic or (neo)adjuvant anti-cancer treatment, including intravenous and/or oral treatments; Patient physically/psychologically fit to participate in the study; Patient able to understand, communicate and use the electronic device; Patient owning a smartphone or tablet with internet connection; Treatment supported by the French social security system.  Exclusion Criteria:  Unable patient for signing informed consent; Unable to understand, communicate and use the electronic device; Patient under trusteeship or guardianship; Patient under legal or administration protection.