Our project focuses on improving the lives of disadvantaged communities, particularly those suffering from Mild Cognitive Impairment (MCI) in various regions. The prevalence of MCI in people over 60 is very high, reaching 33% in Vietnam (with 62% of patients concentrated in rural areas) and up to 70% in some parts of the world. Among them, the number of female patients with MCI is twice as high as that of male patients. Patients with MCI are likely to progress to dementia (Alzheimer’s), which greatly affects their quality of life in multiple domains, including cognitive, behavioral, and functional domains, and that is why we focus on this group. By developing games that focus on four cognitive abilities: memory, attention, language, and math, our Braintrain application can help MCI patients improve their cognition at a reasonable cost. They can remember daily events better, reduce the inconvenience caused by MCI, especially language, attention, and math-related issues. Moreover, MCI is a golden period for intervention. Without timely measures, MCI patients may miss an important intervention period and quickly progress to dementia. Our project has an important and meaningful mission to provide these patients with more time to enjoy life while pushing back Alzheimer’s disease.