EmerMeg / digital entry

EmerMeg is an app which makes the screen flashes red when people in your EmerMeg contact list contact you, and only disappear after you replied the message, which ensures the people you care about could reach you in time and preventing others from ignoring your calls/messages. This doesn't make a sound since many places require people to mute their phone. Also, you could easily delete someone from your EmerMeg contact list if you don't want to reply to their message.