In terms of betting I like the Bet365 app because they're offering a Euro 2012 Bore Draw. If any games ends Nil Nil they'll give you your money back. A good deal in my opinion. I've also being using the FilmOn app which is great for watching live coverage of games from BBC and ITV on your iPhone or iPad.
Paddy Power are also offering some good money back specials for the European Championships. For instance, if you placed a 1st Goalscorer or Last Goalscorer bet on the England versus Italy game last nights 0-0 draw then you get your money back. They're giving over 1 million back following the game because it was a no score draw. Their sports betting app is also excellent on both the iPad and the iPhone.
Have you tried the official uefa Euro 2012 app. There is both an iPhone and Android version. I've found it to be pretty handy over the last couple of weeks. It obviously doesn't have a sports betting facility but if you want to get regular alerts and updates on your favourite teams it's pretty good. It also features league tables, news, pictures and there are even some video highlights of the matches available. It's a free app I think most soccer fans would find useful