React Mobile is a really good way to let your friends know when you're feeling unsafe on a walk home. If the slider is on green, all your friends know you're safe and don't need any help. When you begin your journey, slide the marker to yellow and your friends will know that you are headed out and want some attention. Finally if you find yourself in an emergency, slide it to red to send out an alert to your friends so they can get you to safety. Fr more, continue on this walkthrough. Find out more in our Best Safety Apps.