...The way it works is pretty simple. You upload your presentation into Presefy, and when you're ready to present, you navigate to the presentation on your phone and select. You then have a URL you can display the slides on a projector or share the code with the audience so they can follow along on their devices.
The cool thing about booting it up on your phone is that you then can view and control the presentation from your device. The clicker devices you can buy for presentations are cool, but nearly everyone has a web-enabled phone these days, and its great to see the presentation on your phone's screen...
Presefy lets you connect with your audience via your smartphone no matter where you are, and you can also interact with your audience. Sign up for free.
Review by @rmbyrne http://www.freetech4teachers.com/2013/03/presefy-let-your-audience-follow-your.html#.UUTBozeGnk8
Presefy website http://presefy.com/#/landing