You can listen back to your Google voice searches!

The 'Ok Google' command is an incredible tool, letting you do pretty much everything with your phone without having to lift a finger.

Sure you can just use it for the odd web search but it also lets you set timers and reminders, add calender entries and start up an app. You can make a phone call, get quick wikipedia responses to questions and even ask follow up queries.

It's pretty amazing, but did you know that Google is recording you every time you say those magic words?