Efficiency of an mHealth Intervention on the Health Literacy Improvement and Self-management.

Inclusion Criteria: * Patients of both sexes and over 18 years of age; * Attended by the health professionals of the Basic Health Areas that are participating in the study; * Patients that give their consent to participate in the study by signing an informed consent; * Patients that have a mobile device (Smartphone or Tablet) compatible with the Android or iOS operating system; * Patients considered as multi-pathological based on the following criteria from those described in the Integrated Healthcare Process (Ollero et al., 2018): * Be classified in clinical category A of chronic pathologies due to heart failure that, in a situation of clinical stability, has been in NYHA grade II, being able to be simultaneously classified, or not, in other clinical categories due to suffering from another disease Chronicles. * Patients with at least one of the following complexity criteria: Extreme polypharmacy (10 or more active ingredients for chronic prescription); Socio-family risk (score on the Gijon scale greater than 10 points); Stage II or higher pressure ulcers; Malnutrition (BMI \<18.5); Feeding with chronic and prescription tube (3 or more months); Two or more hospital admissions in the previous 12 months. Exclusion Criteria: * Patients with sensory deficits and/or mobility problems in the upper limbs that prevent them from using the application correctly, despite using the accessibility features of mobile devices; * Patients with persistent cognitive impairment (Pfeiffer test with 5 or more errors or Lobo's mini-cognitive exam \<23 points) and / or severe mental disorder; * Patients with serious limitations for AVBD (Barthel index \<20 points).