Effects of a Digital Health Application (Lipodia) on LDL-cholesterol Levels

The goal of this clinical trial is to find out if lipodia, a digital health intervention, can help lower cholesterol levels and improve other health measures in adults with high cholesterol. The main questions it aims to answer are: * Does lipodia, together with regular treatment, lower LDL cholesterol (bad cholesterol) better than regular treatment alone? * Does lipodia help improve other health outcomes, like how confident participants feel in managing their health? Researchers will compare two groups: * Intervention group: Participants use the lipodia intervention and continue their usual treatment. * Control group: Participants continue with their usual treatment only. Participants will: * Fill out questionnaires online and visit a certified lab at the start of the study, after 3 months, and after 6 months * Have blood tests at each lab visit to check their cholesterol and other blood fat levels * Continue with their usual treatment (both groups) and use lipodia, a digital health app, for six months (intervention group only)