Girls and women with ADHD are diagnosed 5 years later than boys and men, estrogen affects dopamine and ADHD symptoms. This increases the risk of health-damaging symptoms in women, and today there is little research and no tools for women. Letterlife gives women knowledge and self-awareness, allows them to keep track of vulnerable periods and their Hormones. Allowing the patient to track hormones, symptoms and medication and own their own patient data to enable the right treatment and find the right healthcare provider. Letterlife is developed by and based on Lotta Borg Skoglund's research together with some of Sweden's leading experts in hormones and epidemiology.