Inclusion Criteria:  Cancer patients with tumors in the GI tract undergoing chemo and/or Immunotherapy and are primarily treated on an outpatient basis ≥ 18 years Life expectancy ≥ 6 months Eastern Cooperative Oncology Group (ECOG) Performance Status ≤ 2 Open for, and ability to use, of E-Health platforms (own and uses one or more electronic devices with access to internet) Able to take 75% of foods orally Valid declaration of consent to participate in the study  Exclusion Criteria:  Cancer patients with other diagnoses or who are not receiving chemo or Immunotherapy or undergoing intensive therapy requiring longer in-patient stays (e.g: Intensive Care Patients) ≤ 18 years Eastern Cooperative Oncology Group (ECOG) Performance Status ≥3 More than 75% of Energy intake is not taken oral but instead via enteral or parenteral route. Operation planned during the course of the Study (next 3 months) Patient who do provide not or withdraw their consent Not open or willing to use E-Health tools