WhatsApp Intervention for Seniors' Digital and Cognitive Management (WISDOM)

The goal of this clinical trial is to learn if a digital health literacy program using mobile phone chat-based application called WISDOM (WhatsApp Intervention for Seniors' Digital and cOgnitive Management) can help older adults in Singapore with fewer resources improve their digital health skills and support brain health. The main questions it aims to answer are: * Is it feasible to run WISDOM in senior centres, and will participants join and stay in the program? * Does WISDOM help older adults find and use online health information? * Does WISDOM help older adults make health decisions and impact brain functions? * What do participants think about WISDOM, and how can it be improved? Researchers will compare two groups: * WISDOM group: Participants will join a 6-week program with face-to-face learning sessions and WhatsApp activities about digital health skills. Extra support will be given if needed. * Control group: Participants will continue with their usual activities at the senior centres. Participants in the WISDOM group will: * Join weekly face-to-face sessions for 6 weeks * Use WhatsApp to complete learning activities