You might have read in our Watch Dogs gameplay preview from E3 2012 that the game will support a complementary mobile app that taps into some of the included multiplayer and online features. It's basically the sort of SmartGlass functionality that Microsoft crowed about during its pre-E3 press briefing, but for all versions of the game.
The E3 demo for Watch Dogs included a brief look at the app, which renders the game's open-world Chicago as a VR-style construct. You can tap on different locations throughout the city to gather information about them and put your various hacker tools to work; it's not clear exactly how this will link into your game -- Ubi isn't confirming support for SmartGlass -- but it seems that at least some of the tools you'll have access to are specific to certain neighborhoods.
There's more to the app than that, however. You'll also be able to track the progress that your friends are making through the game in a variety of ways. Not just how far they are into the story, but the actual steps of how they go about completing each mission. Whenever you use the app to access a specific mission, a timeline appears at the bottom of the screen that you can cycle through for specifics on how you or whoever you've highlighted proceeded through that mission.
What's more, it seems that you'll also be able to interact with your friends' games using the app. Changing traffic lights and raising/lowering drawbridges -- two features that were also shown off in the E3 gameplay demo -- are just a sampling of what you'll be able to do, to either help or hinder your friends' progress. Ubi isn't saying anything about the release timeframe for the app in comparison to the full game. There's also no word on which specific operating systems the app will be usable on, but the goal is to make it universally available to anyone who plays the full fgame.
Stay tuned for more information on the app and the game it links up with in the coming months. Watch Dogs is supposed to be headed our way sometime in 2013, and it's definitely something you should be excited about based on what we've seen so far.