SMS Lifeguard helps you to alert other people in the vicinity of a suspected heart attack or other medical emergency to help them. When you receive an alarm from the system, you can immediately reach the person who is in danger and will also send an SMS message to alert them to the situation. This app can be used on iOS and Android.

You must enable location services for the app, and remember to select "Always", otherwise you can not receive alarms! If you do not allow location services "Always", the system will not alert you as your position quickly becomes obsolete.