This app is for the elderly over 65 years of age with reduced mobility, the disabled, dementia patients, severely ill people, etc., as well as single-person households, kindergarteners, elementary, middle and high school students, etc. It is a relief service app developed to prevent damage by sending text messages or warnings (sounds, vibrations, etc.)
It is operated by mobile phone without having a separate server, and since it does not contain personal information, anyone can use it without risk of leakage of personal information.
The app will not work if your phone is turned off. Always check your phone's battery and charge it.