For many older adults living alone, a smartphone is not a convenience. It is a lifeline. In elder care meetings, we often discuss telemedicine, wearable sensors, and remote monitoring systems. We focus on dashboards and data. Yet in our pursuit of high-tech solutions, we frequently overlook the most widely used and emotionally loaded digital tool already resting in older adults’ hands: the messaging app. In Taiwan, as in much of Asia, LINE is not just a chat app.