Folia is a system designed to use patient and caregiver knowledge to improve their care. It offers a health care app that captures all the health data of the treatment use, symptoms, and behaviour, and tracks any health observation - from COVID-19 symptoms to flare-ups associated with a chronic condition, to which treatments are used and when - toimprove care. These observations could be subtle changes in symptoms, mood, side effects, or how well a treatment is working.