Presentation coming up but no time to practice? Prezi Viewer for Android is a free app that lets you view, practice, and present on the go. When you’re traveling to a big pitch or meeting, you can use the transit time to run through your presentation on your phone or tablet. Once you arrive, connect via bluetooth to your PC or Mac and present on the big screen. Let’s say you’re seated next to a killer prospect on the flight home. You can present your saved presentations offline, so you’ll ne