You gave the phone to your child in school? But school principle requires phone's sound be turned off?
That right and correct. BUT! He always forget to switch phone on back! And you can't call him when the lessons are over and you can't tell him that he should wait for you for 15 minutes more, or go with his friend's parents!
You are on meeting and waiting your boss to call, but vibro doesn't work well, since the phone is in deep pocket?
And so on, and so on... there are too many situation when specific signal should be shouted out loud!
If it is a your case - then this application is for you. Well... not exactly. This application is for my son, but I'm not greedy, so please - use it.
And if you are not greedy either, please buy the donation package. And don't hesitate to report me about the problems you have and your feature requests.
The application is developed under GPLv3 license. Source codes could be found on https://github.com/comargo/shout-important-contacts