안심in is a safety app developed by the Incheon Metropolitan City Hall to create a secure environment for vulnerable groups such as women, children, elderly living alone, and elderly with dementia. This app not only offers safe return home services but also integrates with the local government's CCTV control center for crime prevention services. Users can easily register through text authentication to access various safety features.

The key features of 안심in include:

• Emergency assistance requests through 안심in, where the user's location and appearance are transmitted to the Incheon city CCTV control center for protection against various crimes.
• Activity radius alert service that notifies users if the distance between them and the protected person or if the protected person strays from the designated radius (useful for children needing guardians or elderly with dementia).
• Alerting friends for urgent help requests, simulating a call in situations where someone is following the user in dark alleys.
• Witnessing a crime and automatically sending a text message to 112 with the current situation's photo and the witness's location (latitude, longitude).
• Safe return home feature that tracks the user's movement path for added security.