For me Circle of 6 is a unique app that lets you connect to up to 6 close contacts. The app has different notifications that the user can tap on to alert their circle. If you need a safe ride home or for a familiar face to turn up and take you away from a strange environment, this app will help send an alert to any of your 6 chosen contacts. On top of that, the app can connect you to the proper authorities for an emergency, or even just for relationship advice.