A free program for Android, by Anatoly Kuchin.

SView Cover is an android application that allows you to see who’s texting and calls you when you don’t have your phone with you. It works by using your phone’s proximity sensor to detect if you are close to another android device that has the app installed.

Once it’s installed, all you have to do is add the app to the devices you want to monitor, set the timeout value (in seconds), and you’re ready to go!

You will get an instant notification when someone calls or texts you.

To make sure it works, make sure your phone’s proximity sensor is enabled.