Evaluation of the WARIFA App and Its Impact on Healthy Lifestyle

The goal of this study is to assess the effect of the WARIFA app on the adoption of healthy lifestyle behaviours related to Non-communicable diseases (NCDs), as well as in the management of Type 1 Diabetes (T1D). This is done using user-generated data analysis, artificial intelligence (AI) and risk estimation to provide personalised recommendations on lifestyle-related behaviours through a mobile app. * Primary objective: the objective of this study is to assess the impact of using the WARIFA app on a series of outcomes, related to the promotion of healthy lifestyles and prevention of NCDs, as well as on the management of T1D. * Secondary objectives: to assess the feasibility of implementation of a complex health app (WARIFA), and to explore which outcomes are more relevant in this context for users. The study will evaluate the app in two different populations: * Population 1: Citizens living in Europe of either sex aged \> 18 years diagnosed with no more than one NCD (of the following: CVD, any type of cancer, chronic respiratory disease and T2D) and current owners of a smartphone with internet access. * Population 2: European adult individuals of either sex aged \>18 years with T1D currently using multiple daily insulin injections or an insulin pump and current owners of a smartphone with internet access. The study will be carried out in three centres in three different countries: the Instituto Universitario de Investigaciones Biomédicas y Sanitarias (iUIBS) in Spain, the Norwegian Centre for E-health Research (NSE) in Norway, and in Romania. Participants in each population will be randomised to an intervention or control arm on a 1:1 ratio: * Intervention arm: the Warifa app will be used by the participants throughout the study. The app will provide personalised risk estimations and recommendations through user-generated data analysis and artificial intelligence. * Control arm: The control group will use a Warifa app with the same functionalities than the i