<p>In an ageing society, reducing the number of people with dementia is one of the most important health policies. In the recent years, many studies have focused on dementia prevention, with technologies, such as smartphone apps, attracting considerable attention. These apps help people to manage their lifestyle habits and support them in maintaining an optimal lifestyle to prevent dementia. However, people with migration backgrounds are often excluded from these technologies for various reasons, including digital literacy, language proficiency, socio-economic situation, and educational attainment. To successfully implement health policies, it is essential to address the social structures that prevent people with migration backgrounds from accessing these technologies. Fostering solidarity could be an effective way in achieving this goal given its significant role in movements such as the women’s liberation movement, the Black liberation movement and the disability rights movement. However, the problem is that people with and without migration backgrounds often find it difficult to recognize their similarities. People with a migration background have experienced various forms of discrimination because of their migration experience. Those without a migration background have not had such experiences. This makes it difficult to form solidarity because, by definition, solidarity requires a shared sense of similarity between the sender and receiver. This paper aims to demonstrate how people with and without migration backgrounds can identify these similarities in order to foster a sense of solidarity.</p>