The first rugby app to truly put fans at the centre of the action throughout the Championship, it gives viewers their say on what will happen ahead of key moments in each game.
Players will be able to predict the result of penalties and guess where the kick will end up in conversions. Play against friends, by logging in through Facebook, or against all users, competing to get your name at the top of the leader board.
Available on iPhone, iPad, Android and Facebook to download from today, the app will activate 40 minutes before each live match; fans will be able to test their rugby knowledge with a series of pre-game questions.
You can play during just one or all the RBS 6 Nations games, starting with tomorrow's match between France and Italy.
There's also the choice to play as an individual or challenge your mates, and for the patriotic there's the option to sign up as one of the Six Nations and represent your nation.
Combining knowledge-based questions with the excitement of uncertainty, this app will be the ultimate companion for all RBS 6 Nations matches.
Don't miss out on the app that will revolutionise the way fans watch rugby - go to www.rbs6nations.com/livechallenge to download the app for free.