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The NASA TV iPad app works too.

Or the xkcd version https://xkcd.com/1446/ (see older frames at http://xkcd1446.org/, the first few are blank so start around #16)

What is this? What's the point?

It's a series of over 100 frames that are being drawn and uploaded live before and during the probe launch. It illustrates the position and status of the probe. (Edit: it's still updating)

https://xkcd.com/about/

The official one was struggling hard when I tried. The BBC is putting out the same stream, with english translations when appropriate: http://www.bbc.co.uk/news/live/science-environment-29985988