App is available for download from nokia collection for free. However from my experience it is a bad application.
First of all - when using it, my 820 gets hot as if I was playing a 3d game, I'm pretty sure being so extensive on the hardware causes battery drainage.
Secondly - when using regional settings other than English, skydrive will not sync (pretty common thing among skydrive-using apps), you wont have access to it, until you go to settings, change regional to eng, reset phone.
There are better solutions, bookviser (which so far is like first app that has skydrive working in it despite regional settings not being set to English) for example - also free, minimalistic and does what it's meant to do. Pretty sure there are other good apps available as well.