by Maven Technologies Pte Ltd
Download this app if: if you're somewhere you can't receive calls.
Do you have to leave your mobile phone somewhere where you cannot access it? Maybe you work at an institute where phones with cameras are not allowed in your office. It's definitely not worth risking getting caught violating the rules and now you don't have to, with the PigeonHole app.
Potentially useful? — I'm not sure exactly why... when my phone's off it still tracks missed calls and emails for me, but I guess there's a use for this somewhere.