Many seniors rely on WhatsApp for daily communication but find standalone apps confusing. A service that integrates directly into WhatsApp could handle appointments, reminders, and simple queries without requiring new software.
Offer memory aids, medication reminders, and family updates through a chatbot interface. Charge families or caregivers a subscription for managing their loved one's schedule and needs.
The MVP could be a basic reminder bot with manual follow-ups. The biggest risk is WhatsApp changing API access or policies.